Adventure-seeker Ted Osborne has convinced his finacee Carole to finance his expedition to an uncharted South Pacific island supposedly populated with dinosaurs...
A private detective, soon to enlist in the army, is drawn into one final case when his police officer father is killed in the line of duty. Soon his prime suspect is murdered as well, and he finds himself framed for the crime. As more witnesses get murdered, he finds himself on the run from both the police and former Prohibition violators who seem to have found a new racket.
George McAllister, the black sheep of a wealthy family who has squandered his share of the family inheritance, lives in constant jealousy, hatred and resentment of his half-brother Barry, who has been supporting him. George gets his girlfriend, Carlotta Duval, a job as Barry's nurse, with the idea being to marry him, kill him, and inherit his money—and marrying George.
