The combined efforts of a stubborn tugboat captain and investigating police officer bring about the arrest of infamous crime lord Bull Bransom (Stanley Fields), who is sentenced to Blackwell Island prison for assault. With the help of corrupt political boss Steve Cardigan (Morgan Conway), Bransom takes control of the prison until reporter Tim Haydon (John Garfield) gets himself sent to the prison in order to gather evidence of Bransom's connections to Cardigan as well as a string of murders.
Blackwell's Island is a highly successful movies. This was William Mcgann’s 1st Movies in this genre. His most popular Movie was When Were You Born?. If you liked that Movie, you should also try Bullets or Ballots, Each Dawn I Die, and Exclusive.