On this planet, the sun is so dazzling that some of the inhabitants—the Solarians—lose their colors and start looking alike. Coppelius, the planet's leader, usually performs the Coloring Ceremony to restore the Solarians' colors. But this time, Coppelius seems absorbed by another project—one that could destroy creatures in the shadow lands. Can the Little Prince convince Coppelius to restore the planet's balance of shadow and sunlight?