In the heart of southern France there is a fog-prone area where, according to legend, a bloodthirsty creature wreaked havoc 250 years ago. A rumor is spreading again in this legendary place, as eyewitnesses report an animal with large paws and a long tail that crosses roads in a single leap - powerful enough to tear down a horse and leave it mutilated in the pasture. Is the Beast of Gévaudan back? The animal photographer Bruno Loisel has a supposedly more rational explanation. The animal that fits the descriptions could be a cougar, but this species of big cat is only native to America. In order to learn the proper techniques for tracking down the puma, he travels to Canada, where he accompanies a team of researchers dedicated to studying the shy, almost invisible predator. Will Bruno be able to use his findings to solve the mystery of the new beast of Gévaudan?