In the Arctic tundra, a skilled young Iñupiaq hunter named Piña lives with his parents in a sod house, isolated from other people. The Iñupiaq are an Indigenous people of the Arctic, and Piña's family survives by hunting caribou and seals, storing food in a sigluaq, an underground cellar carved into permafrost. After each kill, Piña honors the animals through ritual, releasing their spirits for rebirth. His silence contrasts with the memory of his two older brothers, Atau and Maliğu, who disappeared into the mountains years earlier. They left behind only a bow that Atau crafted and Maliğu carved with etchings of animals and locations, making it both weapon and map. Their mother clings to stories of her missing sons, while their father carries a carved ivory goose charm he has kept since the boys vanished.
When Piña's mother sends him into the mountains to gather obsidian for tool-making, a golden eagle of enormous size hurtles toward him with talons extended. Piña dives aside and draws his knife. The eagle lands and shakes its head until its feathered face peels away, revealing a tall man in a parka of golden feathers tipped in copper. Recalling his mother's teachings that animals are powerful spirits who wear animal forms as parkas, Piña lowers his knife and addresses the stranger as "Elder." The man introduces himself as Savik, meaning "knife." Savik reveals that Atau attacked him on sight and was killed, and that Maliğu froze and refused his request, meeting the same fate. He demands Piña come with him or die. Piña agrees on the condition he can bring his bow. Savik allows it but severs the bowstring, and they set off.
They travel for 46 days. Piña ties a knot in the cut sinew for each day, tracking the distance from home. Along the way, he hears a rhythmic vibration from the mountains; Savik explains it is his mother's heartbeat. They reach an aerie on a mountain mesa, a cluster of sod houses around a great hall. There Piña meets the Eagle Mother, an ancient woman with sharp golden eyes. She tells Piña he must learn everything she can teach and asks his name: Pinasut, meaning "Three." She snorts when she notes his brothers were Atausiq ("One") and Maliğuk ("Two").
Training begins the next morning. Eagle Mother instructs Piña to replicate the sound of his heartbeat by striking the floor. Once he matches the rhythm, Savik joins on a qilaun, a drum of translucent skin on a wooden frame. Eagle Mother's daughters, Nautchiaq and an older sister Piña comes to call Isiġnaq, begin to sing. The song describes the caribou Piña hunted and the cycle between hunter and hunted. Through the performance, Piña experiences the hunt from the caribou's perspective. Overwhelmed, he asks what this magic is called. Eagle Mother corrects him: It is not magic but song, something every living thing contains.
Over the following months, the daughters teach Piña songs while Savik teaches him to build drums. Winter deepens, food grows scarce, and Piña falls into a deep depression, overcome by loneliness and grief. A lemming with a white chest patch begins appearing at his lamplight and, unusually, does not flee. Piña starts saving food scraps for it, gaining a sense of purpose. He convinces Isiġnaq to let him forage in a nearby valley, where fresh air begins restoring him.
Eagle Mother announces Piña will learn dancing. Savik and Nautchiaq perform a dance depicting Maliğu's capture and death, which Piña interprets as both a threat and a reminder of the consequences of refusal. Savik then instructs Piña to teach a dance to two reluctant volunteers. Piña shares a simple dance about his mother picking plants, opening with a personal story that softens both volunteers enough to engage. He reflects that leading requires connection rather than demands, and that people need not like each other to work together.
Eagle Mother then tells Piña he must learn to build a qalgi, a large sod feast hall designed to hold 100 people. The engineering concepts are foreign to him, and he struggles. The next morning, a mass of lemmings digs under a heavy stone and collectively lifts it on their backs. Piña grasps the lesson: Individual beams cannot support a sod roof alone, but when combined, each carries a share of the load. He rebuilds his miniature model and dubs it "Lemming Hall." With over 20 eagles airlifting materials, Piña and Savik build a full-size qalgi in a nearby valley.
After more than a year at the aerie, Eagle Mother reveals the full scope of Piña's mission. She presents the eagle drum, a hollow rectangular box that produces her heartbeat when struck. She commands him to return home, teach his parents everything, build a qalgi, and host a great feast during early winter the year after next. He must visit the places carved on his brother's bow, where he will find people in pairs, and create gifts so guests do not leave empty-handed. Savik carries Piña home on his back in eagle form, depositing the boy on the tundra after a terrifying flight.
Piña's parents greet him with weapons drawn before recognizing their son and collapsing into joyful embraces. When his father asks what happens if they fail, Piña admits the punishment would be death. His father places the ivory goose charm in Piña's hands and declares they will not fail. Over the following year, the family constructs a qalgi, stockpiles food, and learns songs, dances, and drum-making. Piña then sets out alone to invite guests, following the etchings on his brother's bow. His encounters vary widely: Some strangers welcome him, while others are suspicious or hostile. The final pair he visits, two cheerful men in beaver-skin parkas, accept immediately and travel with Piña toward home.
Cresting the last hill, Piña finds the qalgi surrounded by camps. Most of those he invited have come. The family distributes generous portions of caribou, salmon, and dried meat, and guests reciprocate with their own foods. Piña's family performs and distributes gifts: carved ivory, obsidian knives, slate ulus (curved cutting blades), and furs. Piña hangs the eagle drum from the rafters and strikes it, filling the hall with Eagle Mother's heartbeat. His mother rises to dance as the eagle, her movements so convincing she seems to become Eagle Mother herself.
As guests begin leaving, Eagle Mother appears, transformed from ancient and stooped to tall, radiant, and young, though her eyes remain the same. She explains the true reason for Piña's trials: Singing, dancing, and feasting make old eagles young, and the eagles need human connection to remain immortal, just as humans need it for their souls. As guests exit and lift their hoods, their bodies transform into animal forms: wolves, owls, wolverines. The boy who gifted Piña a pouch of roots shrinks into a lemming with a white chest patch, revealing himself as Piña's companion all along.
Piña's mother declares they must hold the feast again, this time for human Iñupiaq people. The family plans to find others and share what Eagle Mother gifted them. The narrative closes by affirming this was a beginning, one ensuring the Iñupiaq people would never again be alone and that the old eagles would stay forever young.