As Sabrina continues to avoid choosing between Harvey and Dashiell, the pair give her an ultimatum: choose one of them, or neither will stay with her. Meanwhile, her aunts inform that she is finally to receive her witch's license.
For a class project, students are paired up as married couples. Harvey is partnered with Libby, making Sabrina jealous, and when she decides to have Roland - now a private detective - spy on them, he plots to break up Harvey and Sabrina.
Sabrina gets a weird doll that brings monster party crashers; Hilda and Zelda have run out of excuses for not going to their Aunt Beulah's Halloween party.
When Harvey and Sabrina go for the cutest couple title at high school she becomes too obsessed with her looks and her cousin turns Harvey into a beast.
Hilda and Zelda's zany cousin convinces the sisters to switch personalities, and gives Sabrina a cologne to use on Harvey in order to make him more ambitious.
Angry when Zelda allows mean Mr. Kraft to stay in their home while his grandmother's home undergoes renovations, Sabrina and Hilda bring back Mr. Kraft's ex-wife, Lucy, not knowing that she too is a witch.
Sabrina's aunts send in their magic for its annual overhaul, but when it is sent back, it ends up in the hands of three pirate prisoners they forgot to release years before, and Sabrina, also without magic due to a mishap, must save them.
As punishment for trying to break up her Aunt Zelda and Mr. Kraft, Cupid instructs Sabrina to bring a couple together for Valentine's Day or face the consequences.
Sabrina receives a C on her English story and Zelda suggests she use a manual typewriter to help her out. The typewriter turns out to be magic and the characters from Sabrina's spy-story come to life and they're all clones of Harvey, Libby, Mr Kraft, Mrs Quick and Valerie. Hilda & Zelda receive Other Realm chain-letters and are bombarded with strange enchantments.
When Sabrina's evil vice principal, who is also Zelda's boyfriend, comes over for dinner, Sabrina and Hilda put "silent spells" on themselves to keep them from saying anything rude. Except, as Sabrina is later told by their talking black cat, Salem, when two silent spells are cast in the same household at the same time, the house becomes a silent movie.
Sabrina and her aunts travel to Hawaii for a family reunion, but when they arrive, Sabrina discovers that she will not be able to enjoy herself until she solves the family secret once and for all.
