Mortal Combat! 5,000 Fathoms Under the Sea.Joe sees his parents killed every night in his dreams. An extreme exhaustion is left in his body. A research institute for the Earth's crust, which is located at the bottom of a deep sea canyon 10,000 meters below sea level, breaks off a connection. Ken and Joe go to the research institute in Marin Saturn in order to investigate. While going deeper, Joe takes a relaxing nap. As a message from the surface relates information about the existence of a mysterious submarine, Joe hears it, has a nightmare and pulls the cord of the radio set, tearing it to pieces...