This movie is about US nuclear submarine armed with ICBMs, which is send to Pacific ocean for quite a long term. After some time some team members became sick with some unknown "lepra"-like contagious decease. They got orders not to return to base but stay in open ocean. Submarine commander discovers that this decease was spread out from missile warheads, which were not usual nuclear devices but some biochemical weapons. Meanwhile commander befriends dolphin, who starts to follow submarine all the time - apparently it's because Commander is a decent officer who is able to maintain dignity in such difficult situation. When team became tired and dangerously crazy Commander decides to disappear whole submarine and open piracy at high seas to allow his people some way to spend their last days with pleasure of plunder and rape. They prefer to hijack tourist ships, take supplies and pretty prisoners and hide all evidences under water. But when crazy team members decides to launch biology tipped missiles to avenge whole world for their fate, Commander maneuver submarine too deep underwater and crashes it. Friendly dolphin make nice farewell scream. That's all :)