​Five hundred years after the catastrophic  Galaxy War, a stealth fighter craft named Selene's Shadow unexpectedly reactivated when a thrill-seeking farm girl flies too close to its centuries-old crash site. Emerging from states, the ship's captain, Shade and his uncannily independent AI commander, Selene befriend the young pilot, Sorrento, becoming protectors of her backwater farming colony. But when the resurgent Molinsha Khanate war fleet attacks, Shade must race to find his long-lost twin sister Themis, The captain of another fabled supership, the Titan's Anvil. Believed destroyed in battle against an alien mega-weapon known only as "the Gate," Themis may be the key to stopping the Khanate's violent bid to reconquer humankind. To save humanity from annihilation, Shade and Selene must solve the enduring riddles of the Galaxy War, unlock the ultimate capabilities of their advanced ship-selves, and dredge the depths of space itself to recover their missing twin. The face of the known galaxy depends on it.