The school organizes a draw for work experience placement. The gang wins the ticket to the police station without Charly, which goes to Mr. Rubenacker's horse stables. While helping the stable keeper, Mr. Springer, Charly meets Cindy, Mr. Rubenacker's daughter, who falls in love with him. That afternoon a riding trophy is missing and Charly offers himself to find the culprit on his own. However, Mr. Springer calls the police and they come along with the rest of the gang to solve the case too!