During a powerful storm, the ship carrying the divers becomes trapped. Due to this unfortunate incident, the safety rope snaps, leaving one team member stranded at the depths of the North Sea. With a mere 5 minutes of oxygen remaining, it seems unlikely that help will arrive for at least 30 minutes. The crew faces a challenging choice - to jeopardize the safety of the ship and the entire team, in order to save their comrade and reunite him with his anxious fiancee.