Having lost his heavyweight championship match, boxer Ernie Driscoll now drives a taxi for a living and earns the scorn of his nagging wife, Pauline, who blames him for her lack of social status. Involved with jewel thief Victor Rawlins, Pauline is murdered by him when she impedes his ability to fence the jewels. Blamed for his wife's murder, Ernie must track down Rawlins before he leaves the country.