In a coastal town shrouded in mist and mystery, a group of friends stumbles upon the enigmatic Haimen Incident, only to find themselves ensnared in a web of the supernatural, where the line between the living and the dead blurs....

When a group of divers encounters the eerie remains of a ghost ship in the treacherous waters of Haimen, they unravel a chilling tale of betrayal and supernatural horror, leading them into a dangerous pursuit to escape the ancient serpent's wrath....