Agent Cory Lambert (Jeremy Renner) of the American Fish & Wildlife Service finds a lifeless body in the rugged wilderness of Wind River Indian Reservation. Under these circumstances, the FBI sends Jane Banner (Elizabeth Olsen), a new agent unprepared for the difficulties caused by the oppressive weather and winter isolation in Wyoming. Alongside Agent Cory, with deep community connections and a haunted past, the FBI agent Jane is forming a team to investigate the crime of the US native reservation, hoping to solve mysterious death. At first, Cory and Jane are like water and oil, but as they venture deep into a world devastated by violence, they are forced to protect each other. The film is a fierce look at life, on the brink of an imposing savage, where the rule of law is eclipsed by the laws of nature.