The Daystar Space Rangers are on the planet SharNu to attend the crown prince's coronation. But right away some strange and puzzling things start to happen. Regent Lansur, for example, is trouble right from the start. Does he really want to do away with the young prince? Captain Edge tells the Rangers to guard the boy. Then the regent throws Daystar's navigator into the castle dungeon. Who is that mysterious man she meets there? On top of all that, what's this about a dangerous white dragon that flies around in space?