In 1995, gray wolves trapped in Alberta are trucked south and released into Yellowstone National Park, ending a decades-long absence from the ecosystem. The film follows biologists tracking the new packs as they claim territory, hunt elk, and clash with rival packs, using radio collars and long telephoto footage to get close to animals that had never lived alongside researchers before. Wolf Project scientists explain what they are watching in real time: a pup born in the wild for the first time in generations, a pack leader killed in a territorial fight, the ripple effects on elk herds and even on the park's willows and beavers as browsing pressure shifts. The footage is patient rather than dramatic, built from seasons of watching rather than staged encounters, and it captures behavior, denning, pack hierarchy, cooperative hunting, that had mostly been studied from a distance before. The result is a close account of one of the most closely watched wildlife reintroductions in American conservation history.