John Marsh is playing in the deep, swamp mud and it's making him horny. He warms up by rubbing himself as he wriggles onto the surface of the mud. Soon, he's rock hard and stroking his naked penis. He rolls onto his stomach and humps the mud then rolls onto his back and strokes himself some more. He changes positions a few times and there are a variety of camera angles, including explicit close ups. In the final shot, John is fucking the mud, slamming his body into the muddy bank until he is finished.