In a gloomy voyage aboard an old merchant ship, a group of sailors embarks on a seemingly simple mission: to transport a mysterious cargo from Carpatia to England. However, what begins as a normal routine soon turns into a nightmare as a series of strange events start to affect the crew. Supplies disappear, and tension rises among the men as they feel watched by something beyond their comprehension.
The atmosphere becomes oppressive as they begin to encounter mysterious shadows during the night. One of the sailors, a man haunted by his past, begins to suspect that the cargo is not what it seems. As the days pass and the ship ventures further into the darkness of the ocean, the men confront their own fears. The lower deck of the ship turns into a river of terror as disappearances turn into violent deaths.
With no chance of escape, the crew must unite to confront the darkness that looms at the depths of the vessel. But what is that creature lurking in the shadows? Could it be that what they are transporting in the hold is a curse that not only haunts them but also condemns them? As madness takes hold, each will have to fight for their life in a final battle against horror itself.