There were rumors among the sailors that something was "unclean" on the Mortzestus. However, after two weeks of calm sailing, the main character began to consider these rumors groundless: sea bikes, and no more! When suddenly he saw a ghostly figure climbing aboard the ship from the sea. As if the knot had untied itself, as if it had accidentally collapsed onto the deck of the rei, crushing the sailor to death. Mysterious fog envelops the vessel. And in the depths of the ocean, the outlines of a huge sailboat appear, which is chasing the Mortzestus, and by nightfall the fate of the team seems to be decided: either it will be possible to sit out the night in a battered cube, or they are all destined to disappear - in calm weather, in a calm sea, without a trace...