The Arctic Ocean, 1960. Everything has changed on board the Eridanus, an old prospecting ship anchored off the island of Jan Mayen. In just a few days the crew's cabins have become prison cells and the pantry has been transformed into an interrogation room where Vatne and the mysterious Mr Dodt viciously carry out their work. Now comes their turn to question Dr Christian, the ship’s sick and tormented doctor, who suffers from gaps in his memory but also sudden flashes of lucidity that illuminate the dark passages of his story. During this unrelenting interrogation the strange relationship between the doctor and Mutter, his assistant, as well as other members of the crew, begins to surface. Amongst it all hovers the traumatic memory of the war, of other voyages and of the never-failing presence of the Central, the shipping company for which they all work and which exercises a strict control over the ship.