Mr. Kraft is still dating Hilda, and still boring her half to death. When he announces that he will be chaperoning the Westbridge High ski trip, Sabrina decides that drastic measures are in order: disobeying Zelda's ban on anyone else using her lab top, Sabrina cooks up a potion to make him think like a teen-ager. Unfortunately, Mr. Kraft turns into a particularly obnoxious, irresponsible adolescent, putting both the ski trip and the school into jeopardy.

Sabrina comes down with a case of "finger flu" which causes her magic to malfunction - and accidentally transfers itself to Mrs. Quick who, angered by Mr. Kraft's scheme to replace the cafeteria lady with indentured students, turns him into a chimpanzee. Meanwhile, Sabrina tries to help Valerie gain self-confidence, but turns her into a monster of efficiency and selfishness, while Salem fakes illness to get attention and gets more than he bargained for.