Capetto plans to steal the fortune in gold and then to claim that the mythical "Creature from the Haunted Sea" rose and devoured the loyalists, but it is he and his crew who murder the Cuban soldiers with sharpened, claw-like gardening tools and leave behind "footprints" made with a toilet plunger and a mixture of olive oil and green ink. However, he does not know that there really is a shaggy, pop-eyed sea monster lurking in the very waters where he plans to do the dirty deed and that the creature may make his plan all too easy to pull off.