The date is February 22, 1942. Somewhere beneath the waves of the Pacific Ocean near the island of Guam, an American special operations submarine designated as the SS-188A USS Nighthawk is adrift and slowly sinking after suffering devastating damage from a depth charge detonation. The vessel is descending towards the ominous Mariana Trench, the deepest known crevasse in the ocean. The survivors of the attack must scramble to get the doomed vessel to the surface before their oxygen supply is depleted, or the submarine reaches crush depth and is crumpled like a piece of paper. Meanwhile, a primordial being rises from the depths to plague the crew of the Nighthawk as they scramble to survive. Will they live or will they die? It is up to the players, and the dice to decide!
