David and his friends have a new game called Spy Moves, but they never expected to become real-life detectives! When a classmate asks them to solve a case for him, they can't say no. Soon, David and his friends are swept up into a whirlwind of mysteries: Why did the school bully make Tom Chui trade his Sagankiti cards? Did someone sabotage Mr. Chapman's bike? what happened to Kate's cat? And most important of all, does Bonnie Irwving like Lee Hall? David and his friends will have to become super spies to crack these mysterious cases.