The Double Bass Mystery

Lily is a lovely girl who works in an orchestra. The orchestra goes to a port to give performance. The performers take the plane and all the large musical instruments are carried by trucks. However, Lilys beloved white contrabass is lost. When the performance begins, John, Lilys boyfriend, ask Lily to use his contrabass while he sits at the auditorium. Lily finds that John is there in the first half of the performance and he is gone in the later half. Lilys contrabass, as her hereditary treasure, is very precious, so she hires a detective to investigate. Originally, John hides drug in her contrabass, so it was stolen halfway by drug dealers.