22 May 1968. The American submarine USS Scorpion (SSN-589) has dissapeared in the Atlantic for mysterious reasons. 23 May 1968. As a Soviet deep diver, your mission is to find the Scorpion before the Americans and extract the valuable cargo it contains: an early prototype of the MK48 nuclear torpedo. The depths are hazardous and the exact location of the submarine unknown. Use your ingenuity and stealth to sneak past sharks and explore the ocean floor before running out of air...