When veteran Chuck Scott finds a wallet in front of a Miami diner, he uses some of the money inside to buy himself breakfast and a cigar before returning the wallet to its owner, Eddie Roman. The wealthy and sadistic Roman is astonished by Chuck's honesty and rewards him with a chauffeur's job. One day, as Chuck is driving Roman and his assistant, Gino, Roman turns on a second set of controls in the back of the car and, without informing Chuck, increases the driving speed. When Chuck comments on it, Roman instructs him to pay attention to steering and then proceeds to try and outrun a train. At the last minute, Roman slams on the brakes and, thanks to Chuck's skill at driving, narrowly avoids a crash. Roman viciously punishes those who cross him, murdering a competitor when the latter refuses to sell him a pair of ships. He also keeps a tight reign on his wife Lorna, who obtains some solace on long drives with Chuck. One night, after spending hours looking at the ocean, Lorna offers Chuck one thousand dollars if he will take her to Havana. The next day, Chuck buys two tickets to Havana and, together with Lorna, plots their escape. That night, Chuck packs his suitcase and lies down for a rest. Later, looking for Chuck, Gino finds a travel brochure for Havana, and he and Roman set off after the escaping couple. On board ship, Chuck and Lorna begin an affair. After landing in Havana, they take a tour in a horse-drawn carriage and the driver forces them to leave the carriage in front of a bar. Trying to make the best of it, they go inside for a drink. There, Lorna is stabbed to death and Chuck is accused of her murder. Chuck tries to convince the police of his innocence, but every clue he turns up seems to prove his guilt. Chuck creates a disturbance and escapes, only to be shot by Gino. When Chuck awakens, he is still in his room at Roman's house. The trip to Havana was a dream, but he is disoriented by it and does not recognize his surroundings. Chuck hurries to the naval hospital and there tells his doctor what has happened. Although the doctor reminds him that he is suffering from shock, Chuck anxiously keeps watching the clock, sure that he is late for some appointment that he does not remember. The doctor takes him to a nightclub for a drink, and there Chuck sees Roman and Gino. The sight of the two men jogs Chuck's memory, and he hurries back to the house to meet Lorna. In the meantime, Roman accidentally discovers that Chuck purchased two tickets to Havana, and he and Gino rush to the docks. On the way, Roman tries to outrun a train, but Gino, who is driving, is not able to control the car and the two men are killed in the ensuing crash. Chuck and Lorna arrive safely in Havana, where they will begin their new life together.