On her sixteenth birthday, Sabrina Spellman finds out that she is a witch. However, instead of helping her, it actually makes life more difficult, especially after she gets on the wrong side of head cheerleader, Libby.

Depressed by her lack of talent at sports, Sabrina casts a spell which makes her brilliant at Kung Fu, but when she beats a seasoned professional, her conscience bothers her.

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.