Following the increase in delinquency and crimes in the United States, the prisons are overcrowded. To cope with the problem, the American Government tests a new type of prison for the most dangerous criminals: the Deepwater Prison, settled in a maritime abyss just off the Bermudas. But 900 meters higher, on the surface, an oil rig explodes and sinks, creating an unprecedented ecological catastrophe. A repair team is urgently sent into the deep waters. The only place to stay at this depth is the Deepwater Prison, where mutineers are planning their escape.