Mike Shayne quits detective work to win back his girlfriend, but instead becomes entangled in a case of industrial diamond theft at an aircraft plant. He assumes various identities to track the stolen diamonds to a dress factory and a Hawaii-bound ocean liner, while evading multiple assassination attempts and ultimately uncovering a German smuggling ring.
Blue, White and Perfect
A detective sets out to track down stolen diamonds and a Nazi smuggling operation on a luxurious ocean liner bound for Hawaii.