Sub-Mariner must battle Dovin and his River God cult followers, who are trying to force the American government into signing a treaty of perace with Germany, or else the worst flood in history of the Ohio River will occur!; Reichsführer Heinrich Himmler sends one of his students (in his school for spies and saboteurs) to America for the purpose of alerting Fifth Columnists to change the wave length of every Nazi short-wave radio on the East Coast as the FBI is on their trail.; The murder of an inmate with important information for the warden leads the Angel into a life and death situation within the prison walls.