A community of cougars struggle to survive in the severe landscape of the Northern Rocky Mountains. A determined team of researchers, including houndsman and researcher Boone Smith, mount grueling expeditions in attempts to gain precious scientific data. Meet F51, a young crafty female who makes her way through the winter, but is tested as she struggles to bring her unborn litter to a healthy birth. The matron, wise F109, carries in her radio collar crucial scientific data, but she's a ghost, and a true master of escape. Attempts to retrieve her information turn out to be more than anyone bargained for. Get an exciting and intimate view into the secret life of the cougar.