In a world dominated by robots addicted to pills that recreate human emotions, Nadia has escaped from her confinement and has the key to starting a revolution.

In Cieloalto, life follows a radical rule: aging is determined by where you stand. Move left, and you grow younger. Move right, and you age. Cross the invisible boundary of your assigned life zone—and you die.

Zegaborg, the last Galactic Sentinel, is sent on a fake mission to a remote planet as part of a covert plot to neutralize him. But when alien forces reemerge, humanity’s discarded weapon may be its only hope, if he chooses to fight again.