Since his father left home, Nathan Blue has lived in a world of his own imagination. Inspired by an old TV show, he spends his time meeting Plutonians, hunting babylions and trying to deal with the humanoids at the Boredom Academy. But his home life becomes increasingly difficult when his worried mother demands an end to "this imagination business," and his new friend, Sheron, starts to wonder if Nathan even really understands the difference between his fantasy world and real life.