A glamorous actress is murdered and an M9 agent, whose cover has been discovered, is framed for her murder. Drake task is to get him out of jail and off the island using a submarine code-named Doris.

A prisoner is soon to be released and is offered a well-paid job that is obviously crooked. As he wants to go straight, he reports the approach. Drake takes his place in order to find out what the crime is to be, which is murder.