It’s Christmas night and Murphy hides behind the sofa to spy on Santa Claus who slips into his trailer to leave him a package. No sooner has Santa Claus left than Murphy tears open the present. He discovers a very sophisticated rifle. Convinced that this is the ideal weapon to capture Puck, he immediately goes out on the hunt. But very, very quickly, Murphy is disillusioned when he tries to use his new rifle. It doesn’t work. He hurries home to look for the manual, but he discovers that Puck has stolen it.
Just when El Roacho is about to shoot Puck, Murphy lands directly on his prey. Murphy and Puck are electrified at the same moment and a strange phenomenon occurs: the souls of the two adversaries rise up and switch bodies. Murphy now finds himself in Puck’s body and Puck is now in Murphy’s body. Murphy does his best to resolve this awkward situation.
Murphy, a top explorer and hunter, lands on an alien planet in search of specimens. After proudly planting his flag, Murphy heads out in search of some aliens. One of them, Puck, turns out to be a tough specimen. The bounty on his head is high. This naturally attracts the attention of yet another hunter: El Roacho. And so begins a terrible duel between Murphy and El Roacho for the nauseating prize.