***SPOILERS*** Going undercover as a disgraced policemen Sgt.Joe Geary, Arthur Kennedy, by him punching out his boss Chief Sprague, Jonathan Hale, in the police station in front of a dozen witnesses gets his chance to crack the biggest crime ring in the city. Actually working with not against Chief Sprague Geary becomes a member of the notorious Lockland Gang as an enforcer. It's then that Geary finds out that there's a strong police connection with the gang in that police Captain Reddick, Cliff Clark, and his top man Det. Let. Pagle, Stanley Andrews, run it!
As things turn out the only person who knows that Geary is clean not dirty, Chief Sprague, is gunned down in a shootout with the Lockwood Mob leaving him without an alibi as well as getting framed for the Chief's murder. With only on the lamb and near death, from alcoholism, hood who was at the scene of the shoot-out Benny McKaye, Joe Downing, nowhere to be found Garey is left high & dry with a 20 year sentence, for murder,behind bars! That's until he crashes out of prison with his fellow inmate Tex, John Ridgely, and starts making thing hot for both Capt. Riddick & Let. Det. Pagle the persons who framed him!
***SPOILERS**** It takes a dead man the late Benny McKaye who died drinking to prove Geary's innocent. It also took the State Governor Phelps, Charles Trowbridge, whom if you can believe it Geary kidnapped out of his hotel suite to prove that he was framed by the Lockwood Mob. That by him tricking Reddick's hoods into killing the already dead Benny McKaye a second time around. This with Governor being an eye witness at the "Murder" scene! When confronted with the evidence a deranged Let. Det. Pagle, knowing that the JiJ was up, attempted but failed to shoot Geary as well as Governor Phelps only making the case against him that much stronger! As for Sgt. Geary he got a full pardon from the "Gov" in not only proving that he was framed but by putting the Lockwood Mob out of business and being put in charge, with a promotion and hefty pay raise, of the police Internal Affairs Department!