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.
Charlie Chan investigates a string of murders having something to do with stolen government radar plans.
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.
While on his way to Australia on an unrelated case, Charlie Chan investigates two murders involving “hot money” that occur aboard ship.