The Payback

After being imprisoned for an attempted store robbery, Oscar meets an old inmate named Mac and learns that he has a substantial fortune hidden on the outside. A sadistic guard named Gelli tries to shake Mac down for information about the location of the loot, but he doesn't give up the secret. His stubbornness leads to Mac receiving fatal injuries during another interrogation. Before dying, Mac manages to tell Oscar about a map leading to the hidden money, but first makes him promise to avenge his death by killing Gelli.