A mysterious Chinese woman arrives at Charlie Chan’s home and is murdered there shortly afterward. The only clues are the ring with which she introduced herself, and the message “Capt K” she scrawled before dying.
This was Sidney Toler’s final film and his final one as Charlie Chan. Striken with cancer during his last few films, he was so physically weak during filming that he could hardly walk or say his lines coherently.
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.