 Internationally known concert pianist David Carpenter has a irreparably disabled hand, the result of a tragic accident, and a disastrous cash flow problem. His business manager, Andrew Collis, suggests refocusing the career of David s protégé, brilliant pianist Donna Loring, into more lucrative musical fields. That evening David s car goes over a cliff, an apparent suicide. Eric Sturgis, David s partner in artists management, tries to persuade David s widow Anita to guide Donna into the field of rock-and-roll. Anita is appalled. George Worthington tells Anita that he saw David s car being pushed over the cliff, making his death a homicide. Anita and George tell Perry Mason the tale, but Lt. Tragg finds that George was at a bookie joint at the time of David s death. However, Tragg believes it was murder and arrests Donna. Anita asks Perry to defend the young pianist.