Warning: Practical joker on the loose! Okay, the hairy rubber spiders in Sabrina's cafeteria lunch were kind of funny. (At least she could identify something on her plate.) But the avalanche of popcorn from her locker, the bedroom slippers full of cold and slimy noodles -- well, it's getting a bit old. Positively prehistoric, actually. Who's behind these pranks? Sabrina has her suspicions. There's something about that new Chinese exchange student, Mei Hua. Sabrina's friend Val warns her not to start an international incident. Besides, she thinks Mei is sweet. And Harvey...well, the only thing he's noticed is that Mei Hua is a total fox. But Sabrina suspects there's magic involved...and she smells a rat.