This film tells the dramatic story of Solitaria, a puma mother with four cubs. The place is Torres del Paine, a mountain massif in Patagonia, deep in the south of Chile. It is an intimate family portrait: moving, sad, joyful. We follow Solitaria through the difficulties of early motherhood, as she develops techniques to outsmart the guanacos, her preferred prey, to be able and feed her young that depend on her. But ultimately, tragedy strikes.