By scanning the locations at the bottom of the ocean where sunken ships, treasures and even cities lie, the show tries to answer what they look like, how they got there and if they hide any secrets.
A couple's quiet cabin retreat spirals into dread when they're warned never to open a locked door at the end of the hall. Obsession grows, whispers stir at night, and terror seeps through the walls in this chilling slow-b
