Astraluna Opal, a wide-eyed misfit unicorn, is the last spark of joy in all of Unicornopolis, a society so worn down by the workload of delivering rainbows that it has forgotten how to experience happiness itself. When she and her reluctant sidekick wind up stranded on a distant planet, they must take on a villainous techno-tyrant bent on replacing real joy with his own synthetic, always-on brand: JOYYY®. With the help of a punk-rock banana, a thrill-seeking chimp, and a frog in his underwear, Astraluna discovers that true happiness isn’t manufactured — it’s shared.