...Why did they send Officer Gray on a strange, mysterious mission?

...Why did the members of the Military Council, who have been ruling the planet Vellia for twenty years, suddenly need to find a space pirate captain nicknamed the Ghost?

...What kind of game is being played by Cal, Gray's bodyguard who was once deprived of his memory?

...What is in the small boxes that need to be transported to several planets?

And, most importantly, HOW everything are these related? Perhaps the countdown of events should begin from the day when the emperor of Vellia was killed, and the empress and her newborn son disappeared in an unknown direction?