|An ocean liner sinks off Honolulu and Allen Colby, heir to millions, is presumed dead...but local sleuth Charlie Chan is not so sure, and flies to San Francisco to investigate further. Somehow, the missing Colby is there ahead of him...but is knifed in the back before seeing anyone. Further events revolve around spiritualist Mrs. Lowell, her family of suspicious characters, and the spooky, untenanted Colby mansion, where the body turns up during a seance!
||Three men are convicted of bank robbery, the main evidence against them being that their fingerprints were found at the scene. However, Charlie Chan believes them to be innocent, and his investigation reveals that they are indeed innocent and that their fingerprints were forged and planted in the prison files to frame them. Charlie sets out to uncover the real bank robbers.