Two mystery researchers are on the trail of the Porca Mannara, immersed in a forest, turn with a hand-held video camera and record their research. They find footprints and start following them. After a few hundred meters they sit on a log and are strike by the Porca Mannara. Eventually, after fainting, they wake up while the Porca Mannara is feasting on their cocks, and they will be emptied and left to their fate. Roberta has organized a fiery afternoon with two of her lovers, but her husband returns from the trip before her. Roberta doesn't know how to warn her friends not to go to the appointment and devises a plan...