Sabrina and her classmates at the Academy of Unseen Arts attend a party celebrating Lupercalia, the witches' version of Valentine's Day. Later, she asks her aunties what is Lupercalia. Aunt Zelda explains that it is a nasty, lustful festival started by Roman witches under the reign of Caligula. It was named after the Lupercal, the cave where the twin founders of Rome Romulus and Remulus were suckled by a she-wolf. While it was once associated with fertility and health, Hilda explains that it is now associated with sex.
Zelda explains that it will be a hunt organized by Father Blackwood. She says that the festival consists of three events: the Matching, during which one is paired with a random warlock; the Courting, where the two spend the night in abstinence; and the Hunt, a hunt through the woods which culminates in a frenzy of orgiastic carnality. Sabrina asks if it is voluntary. Zelda says it is voluntary but encourages Sabrina to do it. Zelda claims that Lupercalia is a symphony of sensuality and pleasure, and not of shame and regret. Aunt Hilda Spellman is a bit concerned and thinks Sabrina is not ready.
Sabrina understands Hilda's concerns but is keen to give it a try due to her new relationship with Nicholas Scratch. Zelda gives Sabrina a book about the festival. Nicholas Scratch astral projects to her room and tells Sabrina that she is under no pressure to participate. However, he says he would like her to join him. Sabrina shares his sentiments and prefers to wait until the Matching. Nick replies to leave that to me. Sabrina is haunted by memories of her former relationship with Harvey.
At Baxter High, Lilith, who is posing as Mrs Wardwell, tears down a Valentine’s decoration. She despises the mortals as fools. Lilith complains to Stolas about the indignity of remaining in the mortal world as a result of losing the wager with the Dark Lord. Stolas suggests poisoning the punch at the Sweetheart's Dance. Lilith agrees, seeing poisoning Sabrina’s friends as a loophole through the Dark Lord’s command not to harm Sabrina.
Later, Roz thanks Harvey for making her a card. They are planning to go to the Sweetheart's Dance with Theo. Roz asks if Harvey wants to invite her out for a date. Theo clarifies that they are going as friends.
At the Academy, Zelda chats with Father Blackwood, who comments about her youthful appearance despite her advanced age. Father Blackwood opens the Matching ceremony. Dorcas tells Sabrina that she has a slim chance of being paired up with Nick. Father Blackwood tells the witches to pair up with the closest warlock when the music stops. The witches dance with sheets around a pole. Sabrina tries to pair up with Nick but Dorcas pushes her out of the way. However, Nick had bribed his friend Melvin into wearing a glamour, trapping Dorcas with Melvin. Sabrina and Nick are jubilant.
Meanwhile, Hilda chats with her boss Dr. Cerberus at the second bookshop where she works. She expresses feelings for her boss but he declines. Later, Roz meets with Sabrina and tells her that she has been dating Harvey and that Harvey has invited him to the Sweetheart's Dance. Sabrina lets her date Harvey because she is dating a new boyfriend named Nicholas Scratch.
Elsewhere, Theo Putnam tells his dad that he is planning to attend the Sweetheart's Dance with his friends. His dad asks Theo if he wants to wear a dress but he decides to wear a suit because he feels more comfortable with himself in boy's clothes. He does not think that he is a girl at all. Mr Putnam refers to him as Susie but Theo replies that he is not a girl even though he looks like a girl, have a girl's name, and his dad thought of him as a girl. Theo's dad misses his daughter but Theo replies that he feels good when people address him as a male. He adds that he can’t continue being a girl. Theo pleads with his father to call him Theo. His dad reluctantly accepts his son’s request.
Later that night, Ambrose briefs the couples about the Courting ceremony. He explains that they will go into the woods and disrobe themselves under the moonlight. Ambrose says abstinence is preferable but is not opposed to participants having sexual intercourse. Father Blackwood warns the couples to stay on the path due to the dangerous creatures in the woods. The couples head into the wood. Zelda notices an extra anointment basket and Blackwood replies that it is a shame to let it go to waste; hinting at their romantic relationship.
Sabrina spends time with Nick, who admits that he is terrified about the upcoming Hunt. Nick says he has never dated a mortal before and doesn't want to mess things up. He and Sabrina kiss. Zelda and Father Blackwood spend the night together as a couple. Meanwhile, Sabrina and Nick disrobe and anoint themselves. While lying together, they hear the howl of a wolf. The other participants also hear it. Zelda says that it is strange for there to be wolves at this time of the year.
Later, Nick tells Sabrina that he is interested in trying out normal Valentine's Day. He is curious about how mortals celebrate Valentine's Day. Meanwhile, Zelda finds Hilda weeping at home because Dr Cerberus declined her relationship. Zelda tells Hilda to place a glamour on herself in order to win over Dr Cerberus.
Meanwhile, Lilith is visited by her fiance Adam Masters, who has been away for several months working for Physicians Without Frontiers. Lilith asks the secretary Mrs Meeks about the identity of the man and learns that he is her fiance.
Sabrina visits Harvey at Baxter High and tells him that she does not object to him dating Roz. Harvey says she is welcome to attend with her friends.
Later, Lilith returns home to find that Adam has repaired her sink and repositioned her cross. She offers him a neck rub. While chatting, Adam tells her he has brought a gift which turns out to be a fetish doll from the Shona people. The two embrace and Adam offers to help her chaperone the Sweetheart’s Dance.
Harvey shows Theo how to wear a tie. Roz compliments Theo for his new crewcut hair style. Meanwhile, Ambrose tells Nick that he is saving his juices for the hunt. Sabrina appears in a red dress. Sabrina sports a new haircut and Zelda reminds him that she is a huntress.
Hilda visits Dr Cerberus at the bookshop and tries to seduce him. Dr Cerberus rejects her overtures and reveals that he becomes a werewolf during the full moon.
Meanwhile, Adam stops Lilith from spiking the punch and invites her for a dance. Roz dances with Harvey, who asks about the surprising turn of events. Sabrina soon arrives with Nick Scratch, who remarks that the high school ball is more natural than anything they have at the Academy. The couples dance and spend time together.
Theo doesn't have a partner. He is greeted by Billy Marlin, who compliments Theo for is haircut. Theo apologizes to Billy, who in turn apologizes to Theo. When Theo asks why Billy is apologizing, he explains that the doctor told him that he was lucky that he did not break his neck on those stairs. He says he is tired of bad things happening to me. Theo accepts his apology.
Sabrina offers to show Nick around the school, which he accepts. Roz tells Harvey that she had a vision of them kissing. She tells him that she has premonitions of both the past and future. Nick finds Baxter High's library more cozy that the Academy's library. Nick and Sabrina hear the roar of a werewolf. They run out and Nick casts a spell to banish the werewolf. They are joined by Lilith who summons them to her office. Nick confides that the werewolf is his familiar Amalia. He says that she was given to him at birth and that Amalia is his only family left. Amalia kept following Nick during his Academy days and got jealous of him when he was dating. Nick says that he banished Amalia to the dark forests of the Mountains of Madness. Sabrina asks why she is back. Nick explains that he has a connection to Amalia.
Lilith claims that her former High Priest at the Church of Shadows once had a cougar familiar who mauled the High Priest's wife and baby to death. She claims that the familiar was rabid with jealousy. Lilith advises Nick to put down his familiar.
Roz tells Harvey that she is not a witch but that she was cursed by witches. She explains that her grandma called them Cunning Women. Roz tells Harvey that she does not want to frighten Harvey. Harvey says that honesty is what he values most these days and says that things will be good. The two kiss. Harvey asks if their kiss was like in her vision. Roz says her visions usually lead to bad things happening but not this time.
Lilith chats with Adam, who tells her he is home for good. Stolas does not like Adam but she tells him to ignore the raven. Meanwhile, the werewolf Dr Cerberus stalks the night.
The following day, Sabrina asks if Nick wants her to come for the hunt. Nick insists on doing it alone. Sabrina casts a charm over him as he walks into the forest, which is shrouded in mist. Meanwhile, Father Blackwood summons Zelda for a meeting, telling him that he wants to formalize their relationship. Blackwood reveals that her brother Edward Spellman rebuked him when he asked Zelda for her hand in marriage. Blackwood claims that the Dark Lord has ordained their relationship and presents her with two silver turtledoves’ hearts. Zelda says she will consider his proposal and respond.
Meanwhile, Hilda visits an apologetic Dr Cerberus, who tells her that he stumbled an occult tome which had a spell for conjuring a demon. He tells her he is possessed by an incubus, which occurs when his passions are inflamed. He tells her that she can’t be near him because she excites him too much. Cerberus tells Hilda that he loves her but deems himself unworthy of her love since he is a monster. Hilda tells Cerberus that she has to tell him something about herself.
Elsewhere in the forest, Sabrina meets with Nicholas in the forest. A grieving Nicholas reveals that he has killed his familiar Amalia and cut out her heart. He says that he did not want Amalia to get in the way of their relationship. He invites Sabrina to spend time with him on the last night of Lupercalia. He instructs her to meet up with him at the mossy stump when the Hunt begins so that they can spend the night alone. Sabrina accepts.
Meanwhile, Zelda tells Hilda that Father Blackwood has proposed a marriage offer. Zelda confides that she does not love Faustus but respects him. She tells him that she is going to accept his proposal for love but not power. Zelda intends to restore the family’s name. Hilda tells Zelda that Dr Cerberus is possessed by an incubus. Zelda proposes chaining him with Damascus steel in order to tame the sex demon.
Later that night, Agatha tells Prudence about her plans to have intercourse with Melvin, whom she believes to be a virgin. Dorcas reveals that she already had intercourse with Melvin. Prudence tells the Weird Sisters to prepare for the hunt. Sabrina says she is coming but has to gather her berries of phylaxis.
Sabrina astral projects to Roz and tells Roz about planning to have intercourse with Nick on the final night of Lupercalia. Roz confides that she did have a one night stand with a boy named Jordan Bixby at Bible camp. Roz admits that she was really scared but that she liked what they were doing. Sabrina expresses her love for Nick. Roz asks if Sabrina trusts him and reassures her friend that she will know when she is ready. Sabrina promises to call her tomorrow before disappearing.
Ambrose briefs the witches and warlocks about the Hunt. As part of the Hunt, the witches chase the warlocks through the woods. Melvin is intercepted by Dorcas, who wants to have sex with him. Meanwhile, Roz and Harvey spend a night together in bed. Harvey shows Roz his drawings and explains that he sent copies of his sketchbook to an art school in Rhode Island at the advice of Tommy. Roz goes blind and tells Harvey that she can't see anything.
Meanwhile, Sabrina is unable to find Nick and instead discovers a chained Amalia. Sabrina speaks to Amalia and tries to reassure Amalia that she is no threat to her. The werewolf calms down. She is joined by Nick, who tells Sabrina to run. Nick tries to banish Amalia but she attacks him. Sabrina stabs Amalia several times, killing her.
Later, Sabrina asks Nick why he did not kill Amalia. She realizes that Amalia was his familiar. Nick explains that Amalia was the only member of his family left and that she reared him. Nick explains that he had chained her in a cave but that he killed another wolf in her place. Sabrina reassures Nick that his love for Amalia is not a weakness but a virtue. The two embrace each other and mourn the death of Amalia.
- Lupercalia was an ancient Roman annual festival held in mid February against evil spirits and to bring fertility.