Fred and the gang are requested to help solve the mystery of the escaped villain Professor Huh?, but they soon run into Fred's childhood friend, Rose, who acts very aggressively towards him and is trying to compete against the gang to solve the myste... (more)ry first. To make matters worse, Professor Huh? is notorious for not leaving any clues and being as elusive and confusing as possible. The gang tries to solve their most difficult mystery yet, while learning something shocking about Fred in the process.