The crew of the merchant ship Demeter attempts to survive the ocean voyage from Carpathia to London as they are stalked each night by a merciless presence onboard the ship.

Jan Hinrichs is an experienced ship and salvage inspector. After the bankruptcy of his last employer, however, he is not above working as a simple diver. The widower has two children to support and soon a third eater is on board, as his daughter Lena is pregnant. The only problem is that Hinrichs is 55 and, in the eyes of the shipowners, too old for this job that requires bones and fitness. And so he pretends to be 10 years younger at a job interview. He falsifies his diving book and gets himself a fake passport. The world wants to be deceived. Now things are suddenly working out: Hinrichs does his job, he does it well and his boss is happy with him - for the time being.