Sascha Petrosevitch is a widowed undercover agent posing as a tough, international car thief. He has many friends on both sides of the law. One of them, career criminal Nick Frazier, has been like a brother to him. One night while on a heist job, Sascha and Nick are intercepted by a female FBI agent, EZ Williams, who, unbeknownst to Nick, is working in tandem with Sascha. Nick refuses to surrender and the Feds open fire. Sascha takes seven bullets for Nick, saving his friend's life, and nearly losing his own. To maintain his cover, Sascha is sentenced with Nick to the newly refurbished, high tech Alcatraz, where inmates are fitted with special implants to prevent escape. The prison also boasts a state of the art execution chamber, which will be used for the first time on the infamous criminal Lester, who's been charged with robbing an armoured vehicle of $200 million dollars worth of gold--that was never recovered. However, intercepting that plan is a group of expertly trained mercenaries called the "49ers," who break into the highly secure prison. Led by 49er One, the group has come for one thing only--to find out where the missing gold has been buried. When Lester refuses to tell them, they begin taking hostages, and it's up to Sascha to rally the prisoners to take on the ruthless commando force.