Writer: Bill Finger
Cover Artists: Fred Ray, Jerry Robinson
Batman captures a criminal called Big Mike Russo and he is sent to prison. However, once inside, Russo manages to get control of the entire facility with aid from his gang, who had captured the prison's warden and have replaced him with one of their own men disguised as the man. Russo releases some of the most notorious criminals and they start creating chaos in the city, while he controls the operations from inside the prison.

When Batman encounters one of the criminal factions robbing a bank, he tries to stop them, but he fails. However, he notices that one of the thugs is a convicted criminal who should be in prison. With help from Commissioner Gordon, Batman visits the prison, but he finds that the criminal he saw at the crime scene was held up in his cell. Before leaving, Batman checked over the cell of Russo and noticed that the man was wearing different shoes than the rest of the inmates and once they were outside, Batman asked Gordon to arrange something so Batman can be arrested as an undercover agent to investigate inside the prison.

With a different appearance, Batman is disguised as a ruthless criminal and soon, Russo asks him to be part of his next crime. Before leaving the prison, Batman contacts Robin and informs him of Russo's plan. When the criminals reach their destination, Batman reveals himself and with help from Robin fight against Russo's thugs. After a long strugle, Batman and Robin are finally outnumbered and they are both taken back to the prison, where Russo plans to kill Batman on the gas chamber. Using a last wish, Batman asks some medicine from Robin and he delives the capsules to Batman, who is then placed on the gas chamber and apparently killed.

When the criminals take out the body, Batman recovers and together with Robin they get the situation under control by releasing the true prison guards and placing all the criminals back on their cells.