Possessing the extraordinary ability to bring joy to all, Unico, the unicorn, faces the wrath of jealous gods who believe happiness should be their sole domain. Cast away to the Hill of Oblivion by the West Wind, tasked with this grim duty, Unico embarks on a series of adventures through different realms and eras. Along the way, Unico encounters Beezel, a mischievous devil child, and Katy (Chao), a feline aspiring to be a witch. Can Unico forge bonds with these unlikely companions amidst his quest to evade divine retribution?