Cody, Quinn, Luke, M.E., and Mika are the Code Busters-clever clue hunters with a passion for puzzles. They're excited to participate in the school's latest competition. But when it takes a turn, the students discover the school mascot is missing. And it's not the only thing that has disappeared. Someone has stolen the items, but who would do such a thing? The Code Busters team up with unlikely allies as they set out to find the thief. Will they be able to figure out who is responsible for all the damage? And why?