The gods banish a unicorn for the crime of making people happy, and the West Wind refuses to let it happen. That opening thirty minutes builds a world where kindness itself is dangerous, where one creature's gift threatens divine order. The rest of the film never quite recovers that weight, but those early scenes prove Osamu Tezuka understood something most children's stories miss: innocence doesn't protect you from jealousy.
A young unicorn blessed with an extraordinary gift arrives in each new place with the ability to fill hearts with joy. The gods view this power as a threat to their authority. Rather than tolerate a creature capable of bestowing happiness without divine permission, they condemn Unico to eternal exile. The West Wind, moved by sympathy for the innocent, refuses to simply abandon him to oblivion. Instead, she becomes his unlikely guardian, continuously whisking him away to different lands and eras whenever the jealous gods draw near. Across his scattered journey, Unico encounters Beezel, a small devil with nowhere to belong, and Chao, an ambitious cat dreaming of witchcraft. Each meeting tests whether genuine connection can form between creatures so different from one another. The three form an unlikely band bound together by circumstance and longing for acceptance. As they move from one realm to the next, they discover that happiness cannot be controlled or forbidden, no matter how determined the divine forces opposing them become. Unico's greatest strength lies not in his horn, but in his capacity to change those around him simply by existing.