The film unfolds in the icy tundra of North America, where two devoted researchers, Roman and Lucy, navigate both their passionate relationship and the harsh wilderness. As they engage in playful banter while ice-fishing, Lucy teases Roman about his poor catch, provoking a candid discussion about music. Roman shares his admiration for a haunting Gil Scott-Heron song, expressing his belief that "the spirits are your parents," hinting at a deeper connection between them and the universe around them. He muses that if people just listened to themselves, they might hear the messages being sent to them.
One night, as they lay in bed, Roman is disturbed by Lucy's troubled sleep. She confides in him about a nightmare involving a mysterious figure stalking her—a scenario where nobody can help her cry out. Seeking respite, Lucy steps away from their remote life on a snowmobile, where she hosts a birthday celebration for a colleague, allowing herself a moment of distraction amid her haunting anxieties.
The plot thickens when Roman discovers a dead body while working at a small airport, named Tom, and simply states that "he got lost." Meanwhile, Lucy receives news of her acceptance into a university biology program that beckons her down south. During a snowmobile race, overwhelmed by a sense of dread, Lucy flees from a man who seems to be shadowing her. She pleads with Roman to accompany her, yet he feels tethered to their harsh environment, refusing to abandon their base for an uncertain future.
Later that evening, they share an intimate moment, yet Roman senses Lucy’s withdrawal. This disconnect drives Roman to self-destructive coping mechanisms, including substance abuse. Lucy’s attempts to reach him go unanswered, leading her to confront him through shattered glass in a moment of desperation. Their relationship frays further until Sheriff John arrives, extending a hand in an effort to help Roman through his turmoil.
As the days pass, Lucy arrives at the clinic where Roman is detoxing, and their emotional reunion ignites promises for a fresh start. With no funds left, they decide to embark on a journey south, navigating the tundra with their remaining supplies—an expedition to escape the specters of their pasts. As they travel, they encounter the harsh reality of nature when they come across frozen caribou that cascaded to their demise while attempting a treacherous river crossing.
During their journey, Lucy presents Roman with a joke, whisking away the shadow of their troubles, albeit temporarily. They share laughter, skiing adventures, and breathtaking views of the Northern lights, reveling in the fleeting freedom from their haunting pasts. However, their solace is short-lived when they encounter a bear—a symbol of both danger and insight. The bear urges Roman to confront the dangers following them, suggesting that they must tackle their problems head-on rather than evade them.
As they journey onward, they find refuge in an abandoned military base. It is there that Lucy is confronted by her father’s spirit, leading to a revelation of the trauma she endured. Roman vows to protect her, and in a cathartic act, he destroys the base, symbolically killing the part of Lucy’s past that has haunted her for so long. Lucy reflects on their journey and wonders if they are like the caribou, facing inevitable tragedy in search of liberation.
In the chilling aftermath of their attempts to escape, they dig a cave for shelter, reminiscing about their aspirations for a future together. But just as they seem close to overcoming their tribulations, they find themselves ensnared in the icy grip of fate. The film closes on a poignant moment as rescue teams discover their frozen bodies, entwined in a loving embrace, silently conveying the sacrifices made in the name of love against the backdrop of the vast, unforgiving arctic landscape.
