Hieronymus, 16, lives on the moon, colonized for decades by humans. It is a 100% Lunar boy, that is to say he is able to perceive a 4th primary color and to predict the future. But authorities fear the Lunar: according to them, to cross their eyes can make crazy, even kill. All lunar must therefore wear colored protective glasses to signal their particularity.
When Hieronymus reveals her eyes to a young Terrienne and shares a kiss with her, he violates the Lunar Law. In addition the Terran disappears and the trouble begins for Hieronymus now sought by the police.