The promise made on Everest's peak carries into orbit. Season two stops explaining why these men want the moon and starts showing what it costs to actually get there, when the climb becomes political, when partners stop trusting each other, when dreaming together turns into competing alone. The show never flinches from the fact that ambition built on friendship can destroy both.

Picking up where the first season left off, former mountain climbing partners Saruwatari Gorou and Jack "Lostman" Woodbridge have each made it into space, fulfilling the vow they made after spotting the ISA Space Station from the top of Everest. Their personal contest now has a new goal: which of them will set foot on the moon first. Behind their rivalry lies a wider struggle, as the discovery of Helium 3 on the lunar surface sets off a worldwide scramble for fresh resources, along with the conflict such a race is bound to bring. The result is a science fiction adventure drama about ambition on a global scale.