Below

In the dark silence of the sea during World War II, a United States Navy submarine, USS Tiger Shark, embarks on a perilous rescue mission that becomes a descent into madness and terror. The crew's already frayed nerves are stretched to breaking point as they encounter a series of inexplicable and deadly events, forcing them to confront the possibility that their ship is haunted by a malevolent force. As the supernatural occurrences escalate, the survivors must unravel the truth behind a tragic accident that has claimed several lives and hold on to their sanity to escape the clutches of the abyss.