In this fast-paced prison drama, Pat O'Brien stars as former Army officer Steve Jameson, who, after accepting a guard job at the titular penitentiary, initiates military-style reforms. But his changes don't go over with hardened inmate Joe Kennedy (Humphrey Bogart) -- especially when Jameson begins dating the convict's sister (Ann Sheridan). The supporting cast includes Barton MacLane, Veda Ann Borg and Joseph Sawyer.