John Ottway, portrayed by Liam Neeson, leads a challenging and solitary existence in the harsh Alaskan wilderness, where he is tasked with eliminating wolves that pose a threat to an oil drilling team. His life, filled with struggle against the unforgiving elements, exposes him to a diverse group of individuals, including ex-convicts and drifters, all seeking their own purposes amid the unforgiving landscape. As his last day on the job approaches, Ottway pens a heartfelt letter to his estranged wife Ana, expressing his deep feelings of hopelessness and a desire to end his life. Just as he contemplates his future, the haunting cry of a wolf reverberates through the mountains, compelling him to reconsider his fate.
The very next day, a catastrophic plane crash plunges Ottway and his team into chaos amid a raging blizzard. With approximately 15-20 passengers aboard, Ottway takes extraordinary measures to shield himself as the aircraft breaks apart, dangerously leaving him suspended outside. In an ethereal moment, he envisions his wife encouraging him to summon strength and bravery. Awakening in an isolated and frozen wilderness, Ottway discovers the wreckage nearby and finds one of his teammates, Lewenden, gravely injured. Despite his efforts to comfort him, Lewenden succumbs to his injuries.
Determined to survive, Ottway scavenges for clothing to combat the relentless cold and swiftly realizes the gravity of their situation—help is unlikely to arrive. Taking charge, he organizes a group of survivors to build a fire, but their sense of hope is short-lived as they soon encounter danger. An encounter with a wolf feeding on a corpse signals that they are now within wolf territory. With a pack known to fiercely protect their home spanning hundreds of miles, Ottway warns the remaining survivors, insisting they properly bury the dead to avoid attracting the wolves.
As the dead begin to pile, another attack shatters their fragile safety when Hernandez, another crew member, is taken down by a pair of wolves. Tensions rise when team member Diaz, played by Frank Grillo, openly challenges Ottway's authority, which leads to a discussion about their precarious chances of survival. Ottway urges them away from the crash site, emphasizing the vulnerable position it places them in. In their desperate search for identification to return to lost families, they stumble upon a wristwatch with a radio beacon.
Through the rapidly falling snow, they attempt to navigate their way through the wilderness while keeping watch for the lurking wolves. As injuries and fear mount, they find themselves making primitive weapons to defend against the relentless predators. An emblematic moment occurs when Diaz boldly confronts Ottway, but the group is forced to maintain a fragile alliance for the sake of survival. They manage to kill and consume a lone omega wolf as a calculated risk against the pack's retaliation. When they gather around the fire, differing beliefs surface as Diaz spouts his atheism while Talget, played by Dermot Mulroney, expresses faith in God. Ottway, torn between doubt and longing for belief, recites a poignant poem written by his father.
As dawn breaks, the group's struggles continue, leading to tragic losses—their camp is soon rocked by Burke's death from hypoxia, and desperate decisions pave their way. At the edge of a steep canyon, Ottway and Diaz make a perilous crossing but are confronted by the ever-looming presence of wolves. As terror mounts, the situation spirals as Talget's fear of heights results in him losing everything dear, ultimately being dragged away by the pack after a desperate attempt for survival fails. Alone and cold, Ottway faces his deepest fears and memories, laying out the personal belongings of his comrades, haunted by their lost possibilities.
His bitter wait culminates with him stumbling into the wolves' den, where he is encroached upon by the pack. In the climactic confrontation, with only his wife’s photo reminding him of what is at stake, Ottway straps on an emergency wristwatch, arms himself with a knife, and prepares to face the alpha wolf. As he bravely engages in the fight, the screen fades to black, leaving the outcome suspended in uncertainty.
In a poignant post-credits scene, both Ottway and the alpha wolf lie dying together, underscoring the film’s exploration of survival, loss, and the struggle against nature’s unforgiving forces.
