As it turns out Sealab was built on an ancient Indian burial ground and is now sinking into the ocean floor. The only hope to save Sealab is John Bear, Sealab's resident Native American. But in order to save Sealab Shank's must agree to turn the Mess... (more) Hall into a casino which he does. But once the casino opens John Bear still won't stop the sinking (or let Debbie have a lounge show).