On a stormy night at sea, Antonio, Jorge Lillo desperately seeks help for his wife Consuelo as she goes into labor aboard a small fishing boat. He passes a locket to her, a precious keepsake, and their child is born just as a spark of hope arrives, sealing a father’s vow to protect his newborn son.
Many years pass, and Nahuel, Consuelo Pizarro as Nahuel, is twelve and still haunted by a fear of the sea. He makes a shaky attempt to reach a tiny boat, but the plan goes wrong when Calfunao and Rorro—two bullies—grab him and drag him toward the water, and he’s dropped from the little ship as he runs. By the time he makes it to the port to see his father, Antonio has handed over coins to buy eggs in the market from Don Simon, though the chase through the stalls leads to a spill as the boy escapes behind a parked truck. A small black cat then appears, swipes the keys he dropped, and leads him to an abandoned house where he discovers Levisterio, a dangerous magical book long guarded by wizards. An old wizard appears, but the cat’s intrusion buys Nahuel a chance to slip away, while unseen watchers circle. The crows, led by Raiquén, Vanesa Silva as Raiquén, fly toward the abandoned island to alert Kalku, a malevolent crow wizard Marcelo Liapiz as Kalku, that the book has been found and could spell disaster for the world.
Back with his father, the tension between duty and danger surfaces when Antonio worries about Nahuel’s future and a possible send-off to Puerto Montt. Nahuel uses Levisterio to conjure a spell that makes a tiny moth grow to a colossal size, its wings beating a path to the window as the book proves to be real. The next day, Antonio heads to work and the two share a fragile moment of connection, just as the sea stirs again. Kalku responds with a storm, and Raiquén’s dark-eyed crows move in to seize the book, unleashing a towering wave that smashes the fishing ship and separates father and son across the sea.
Nahuel is rescued from the chaos by Huenchur and Fresia. Huenchur’s presence offers a glimmer of hope as she explains the book’s true power and that Kalku is behind the threat. Raiquén returns to rally the crow legions, while Huenchur urges Fresia to guide Nahuel toward his father’s location so they can mount a rescue. As night falls, the two women fight off the approaching hunters, giving Nahuel and Fresia a chance to rest. A shared moment of communication follows: Nahuel speaks with Fresia using two stones, and the ancient Nivulu rises to test them. A Ruende, Sebastian Dupont as Ruende, a giant wolf, lunges to strike the Nivulu, forcing the creature back. With courage steadier than fear, Nahuel, Fresia, and their ally set out toward Kalku’s lair to rescue Antonio, determined to conquer Nahuel’s deepest fears along the way.