It’s April, but there’s still snow on the Montana mountains the day a member of the Madison River Liar and Fly Tiers club finds a Santa hat in the chimney of his rented cabin. With the flue clogged and desperate to make a fire, he climbs up to the roof, only to find the body of a teenage girl wedged into the chimney. When Sheriff Martha Ettinger and her team arrive to extract the body they identify the victim as Cinderella “Cindy” Huntingdon, a promising young rodeo star, missing since November.