Max Monroe becomes the target of three unknown assassins hired by dying mobster Bruno Petrell while trying to romance a British chess-book author.

Mobsters kidnap Lafontaine Smith, a key witness against them. Max locates Smith to testify against mobster Ray Dominick, only for him to be kidnapped by Dominick's thugs.

Injured Max copes with crutches while helping Susie, a blind witness, identity the murderer of Dr. David Carver, a surgeon.