In the 23rd century, mankind has fled earth and emigrated to the moon. The last outpost of civilization is the Lunar Republic of Eden, where the omnipresent Citizens Administration Council grants residents everything they need - except their freedom. 15-year-old Takeru has six months of freedom while the Council determines his social status. Uneasy about the future, Takeru and friends decide to race their customized Lunar Terrain Vehicle in the ultimate tube race!

During routine maintenance on the lunar surface, Takeru finds a strange capsule containing a single photograph. Captivated by the enigmatic girl in the photo, he scours the city in vain for clues to her identity. In desperation, Takeru and friends turn to old man Alan and are shocked by what he reveals. In search of the truth, Takeru and Kazuma escape Eden, but are soon pursued by mysterious robots. Will they head back to safety - or speed past the point of no return?

What do you do when you discover everything you believe is a lie... and your freedom an illusion? Entering forbidden territory, Takeru has uncovered Eden's most closely guarded secret - and finds himself being hunted by the Guidance Council. Shattered and disillusioned, Takeru recklessly attempts to escape to the only place he can discover the truth - and secure his freedom.

In 1969, man landed on the moon. Now three centuries later, he returns to earth... With nothing but a photograph to guide him, Takeru flees the lunar city of Eden in search of a girl he's never met on a planet he's never seen. Thus begins the Chapter of Earth, as Takeru and Biz discover they are aliens on the planet their ancestors once called home. Will they find paradise - or utter desolation?

With the fate of mankind riding on his shoulders, Takeru vows to return to Eden. And after revealing her childhood memories of a space flight gone horribly - and fatally - wrong, Ao demands to go with him. But can their makeshift rocket, scrapped together from an antiquated Apollo program, make the journey? As the series speeds towards its dramatic climax, it's a voyage sure to end in destiny... or disaster.