A dilapidated German freighter from WW2 collides with a modern cruise ship, sending ten survivors aboard its mysterious black vessel, which is actually a Nazi torture ship that's been luring sailors to their doom for years. As they explore the eerie ship, they're stalked by its possessed captain and haunted by its dark past. The group faces unimaginable horrors as they try to escape, but the ship seems determined to keep them on board forever.