The phrase "Here be monsters" has always been associated with the ocean - a mysterious, impenetrable place that conceals unimaginable horrors beyond human perception. A submarine platform situated 6,000 meters below the surface experiences a series of unexplained accidents. A team of scientists and experts are dispatched to investigate. However, the team soon finds themselves haunted by elusive and terrifying apparitions - and an onslaught of brutal fatalities follows suit. Is this just a chain of strange incidents and paranoid hallucinations, caused by the confined and oppressive surroundings and dysbarism? Or is there something lurking within the depths of this abyssal station?