A unique, non-invasive, mountain lion study uses a giant network of trail cameras scattered throughout the mountains over a decade coupled with interviews with MPG Ranch staff and volunteers in Montana, the filmmakers pieced together the life story of the area’s mountain lions. Genetic data gleaned from hair and other samples, in combination with the video footage, has allowed the researchers to trace the life histories of individual mountain lions and their complex interactions with one another, other wildlife, and the rest of the surrounding forest world into a story that contains never-before-captured events and behaviors at every turn.