The Tower Treasure Mystery

On the narrow, curvy road between Bayport and Willowville, a speeding car passes Frank and Joe Hardy, who are on their motorcycles. Out for a Saturday morning ride and an errand for their father, the boys are angry with the reckless driver. After venting their frustration, they continue to Willowville to deliver their father's package. They decide to stop at their friend Chet Morton's before returning home. On the way back, they investigate a car crash, but don't see anyone.

At Chet's house, Frank and Joe learn that Chet's car has been stolen. The friends talk about chasing the thief and going to the police, but decide to go back to the car crash site first. They think the driver of the crashed vehicle and the car thief might be the same person.

Frank, Joe, and Chet pursue their hunch for a while before heading back to Bayport and the police station. They find out from the police that someone just tried to rob the steamboat ticket office. After talking with the police, Frank and Joe go home and talk to their dad about the events of the day.

Because of differing eyewitness accounts at the police station, the brothers think there must have been two people involved. Mr. Hardy suggests it might have been the same person in all three incidents.