A male corpse washed up from the ocean is soon identified as a researcher, murdered aboard the private deep-sea research station of tycoon Claude Nostromo, who claims there was no motive. Steve puts Junior in charge of Adam and Tani as forensic team going down, but they find the other crew in panic or also killed, one while they're there. They find the motive must concern the illegal rare metal mining prospecting, but also that the oxygen is running dangerously low due to sabotage. Steve doesn't wait for the coast guard rescue, which can't arrive in time, but races by speedboat with Danny, who can't stop him from delivering oxygen by dangerous rapid dive.
—KGF Vissers