Lil Chance fell in love with Cooper Sullivan pretty much the first time she saw him, an awkward teenager staying with his grandparents on their cattle ranch in Montana while his parents went through a messy divorce. They spent every summer together, treking in the Black Hills, tracking cougar and falling in love. Then Cooper broke her heart and moved back to New York City. Ten years later and Cooper has given up his job in the police force to run the ranch after his grandfather is injured in a fall. Lil has stayed true to her love of cougars and of the Black Hills and opened an animal sanctuary. She has been targeted by animal rights campaigners in the past but this time someone seems intent on murder. As hikers are killed, animals mutiliated and a family member goes missing, Lil knows that she has no choice but to turn to Cooper for help in her fight for survival ...