After getting out of being grounded for traffic violations with their new motorcycles, the Hardys take on a new case that the Teens Against Crime Agency has given them. The case involves Samuel Spencer, and the theft of $200 million dollars of bonds he had tucked away in a secure safe on the first floor of his mansion. The theft is puzzling in that no forced entry was made into the safe, and the first floor window that was broken looks as though it were broken from the inside. Additionally, the bonds have not been cashed in yet, so it is thought that the thief is still in the area. Samuel is pointing the finger at his brother, Thomas, who was always told the combination every week when Samuel changed it. So, it's up the Hardys to clear Thomas and figure out who is behind the theft.