Spring has sprung in Mayville Heights, and Kathleen's brother, Ethan, has come to town with his band. But not everything goes as scheduled, when Ethan's opening act gets into a fight with a man interested in investing in the town. When the businessman's body is found Ethan's friend is implicated in the crime. Kathleen wants to help her brother by solving the case, but she has no shortage of suspects. Prior to his death, the investor was fighting with multiple people in town. If Kathleen wants a chance of solving the case, she'll need to rely on her trusty feline sidekicks, Owen and Hercules.