Marco is a charming flight attendant. Marianne, a tough submarine officer. Stranded during a storm, they meet by chance in a hotel in Polynesia. They almost succumb to the temptation of a onenight stand… But Marianne has to leave for a top-secret 70-day mission in the far ocean depths! In her haste, she forgets to grab her necklace. That’s all it takes for Marco to chase her and accidentally get trapped aboard the nuclear submarine. At first Marianne is desperate to get rid of him, however Marco keeps on surprising her. Even after he is ousted from the sub and cast ashore, he finds a way to follow her to the end of the world.