CIA agent Wheeler (Jean-Claude Van Damme) and her beautiful partner Mel are hunted by a mysterious organization on a mission to protect a classified document. Mel is killed and Wheeler is arrested. When Wheeler woke up, he found himself imprisoned in a nuclear submarine, an isolated black prison set up by CIA in the deep sea, and he himself became a traitor selling state secrets. In addition to the agent Patrick who tortured Wheeler, there are Wheeler's mentor Edward, female intern Cathy and imprisoned German agent Marco (played by Duflunger). Which of them is the ally and who is the enemy? Some people are interested in the confidential documents in Wheeler's hands, while others are more interested in restoring freedom from the deep sea. Wheeler must find teammates, work together to escape, and prove his innocence.
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