Celestial Mechanica tells the story of a race of mysterious beings who, one day, when humans had taken Earth to the edge of destruction, appeared out of nowhere to give the inhabitants a second chance. One hundred years after this event, one of the beings is unjustly banished to Earth. He doesn't hesitate in doing everything possible to get back to the floating structure that's home to the other members of his race, in order to teach the others that they made a mistake in casting him out.

Celestial Mechanica tells the story of a race of mysterious beings who, one day, when humans had taken Earth to the edge of destruction, appeared out of nowhere to give the inhabitants a second chance. One hundred years after this event, one of the beings is unjustly banished to Earth. He doesn't hesitate in doing everything possible to get back to the floating structure that's home to the other members of his race, in order to teach the others that they made a mistake in casting him out.