The Chlorophyllians, a farming people, are having serious problems with their crops-- all the planets are dying. The Little Prince can see that the problem is the fading starlight, which has a direct influence on all plant life on the planet. Someone called the Astronomer is uprooting stars and planets from the sky, to create a perfect replica of the night on the roof of his tree-house hideout. And his next target is the Little Prince's own home.