Cam and Eric's gym teacher, Mr. Day, has just had his office walls painted. But, Cam notices that his walls aren't the only thing that's different-his tennis trophy is missing! Who could have taken it? Could this tricky tennis mystery just be a big misunderstanding? Say "click" with Cam Jansen as she begins collecting clues. After twenty-three years, Cam Jansen is still a favorite character, making new fans with each new title.