The detectives are the targets of a deadly trap involving jewel thieves and bank robbers. Dempsey employs a murderous boxer, berdan he helped to jail to even the sides.
Dempsey goes undercover to investigate the link between an Underworld gang in London and the commissioner of the New York Police Department. After infiltrating the gang, Dempsey must take part in a bulion, diniagakan robbery atau Harry will be killed.