World War II. After the mysterious death of the captain, Lieutenant Bryce becomes the commander of an American submarine. At his new post he feels insecure, but time is of the essence – it is necessary to continue the war. Soon the submariners rescue three people who survived the sinking of an English ship by the Germans, but among this trio is a nurse Claire. All the sailors know that a woman on the ship – to bad luck, and the ancient curse begins to come true: the boat comes under fire, the level of oxygen drops, the ship is a ghost …