On her sixteenth birthday, Sabrina Spellman discovers she has magical powers. She lives with her 600-year-old aunts Hilda and Zelda as well as talking cat Salem in the fictional town of Westbridge, Massachusetts.
After spending the weekend at Jenny's, under the advice of her aunts, Sabrina reluctantly invites Jenny to her house. However, when Jenny enters the linen closet, she ends up in the Other Realm, at the mercy of Drell.
Sabrina's in a foul mood and only baseball great Brady Anderson can help her out of her slump.
Aunts Hilda and Zelda experience growing pains when they turn into teenagers for the night.
Sabrina and her aunts take a trip to Mars, but Sabrina is reluctant to leave Harvey. She agrees to call him at a specified time, but when her attractive ski instructor takes a shine to her, she soon forgets about the mortal world.
As Sabrina and Harvey grow closer, her aunts reveal that when a witch kisses a mortal for the first time, the mortal turns into a frog. Unable to stop herself, however, Sabrina kisses Harvey, and must find a way to change him back.
When Sabrina uses Libby's likeness to promote a community service program, the real Libby manages to steal the limelight.