Kim Jongin has always been a class clown. But when he's around his crush,Yoonjin, he can't keep his foot out of his mouth, and Yoonjin is fed up. She won't talk to him, and will probably still be giving him the silent treantment when they go on their class outdoor eduation trip.

This trip seems doomed. Not only does Yoonjin hate him, but his totally embarrassing dad,Jaejoong, is coming on the trip as a parent volunteer! The only thing he can do to save the trip is to plan a prank hilarous enough to win Yoonjin back.