Rock devises a plan to destroy the gunship that seems to have trapped the Black Lagoon. Meanwhile, the Lagoon Company accepts Rock as a new member.

While on a mission to retrieve a valuable painting from a sunken U-boat, the Black Lagoon is besieged by missile-firing neo-Nazis.

After finding the painting on the sunken sub, Rock and Revy argue over looking for more loot while the neo-Nazis' own divers approach the wreck.