Submariner — Ocean Map

This Submariner: Mystery Voyage follows a daring submarine expedition into a remote and poorly explored region of the southeastern Indian Ocean, where the crew discovers a massive abyssal fissure known as the Erebus Scar. Descending far beyond the surrounding ocean floor, they encounter strange bioluminescent patterns, unexplained sonar signals, magnetic disturbances, enormous hydrothermal formations, and what appear to be the ruins of something impossibly ancient. At the deepest point of the voyage, they find a colossal stone doorway embedded in the trench wall, marked with a mysterious question mark and transmitting a countdown through the water. When the countdown reaches zero, the doorway opens onto an immense unexplored cavern—and sonar detects something enormous moving within. The crew must decide whether to retreat to the safety of the surface or continue into a place no map has ever recorded, where the greatest mystery of the voyage may be waiting for them.