Nine years ago, the Kingdom of Night began to seep into the mortal realm, and the Kingdom of Rivers was invaded by mó: beautiful and deadly demons that lure in humans with their appearance, then feast on their bodies and drink their souls. Those that survived the mó's initial invasion now live behind protective wards, hoping to get through to another day. Àn'ying hasn't forgotten the face of the demon who killed her father and drank her mother's soul. Àn'ying was helpless then, but now, armed with her crescent blades and her father's magical practitioning texts, she's determined to heal her mother's soul, and the Immortality Trials are her only hope. Hosted by the Immortals in the Kingdom of the Sky, the Trials have taken place for centuries. Open to mortals who can find their way to the Kingdom of Sky, those who complete all eight trials and prove their merit are granted a pill of immortality-a prize Àn'ying believes can restore her mother's soul. But competition is fierce, and if the Trials themselves don't kill her, the other contestants might. Who is friend and who is foe? And who is the irresistibly handsome and frustratingly arrogant contestant who keeps appearing when Àn'ying least expects it--and most needs help? Danger is everywhere, and Àn'ying is beginning to see signs that not all is right in The Kingdom of Sky. Night is coming for the Immortals--and when they fall, all is lost.