The world is on the brink of destruction. The mo - beautiful, ravenous demons who drink the souls of mortals - roam free and they will not cease until all the realms fall to darkness...An'ying must risk everything to stop them.But a betrayal has turned the tides of this war: her handsome rival from the Immortality Trials and the man she was falling in love with, Yu'chen, is now the enemy. Yu'chen is half mo - his mother is the Demon Queen of the Kingdom of Night, and the monster responsible for killing An'ying's father. An'ying's one hope is the boy in the jade - her lifelong guardian and heir to the last mortal Emperor - Hao'yang. Together, they must join forces to rally an army that stretches across realms, from the Four Seas of the Dragons to the Phoenixes of the Golden Desert.But first An'ying must awaken the immortal power slumbering in her own veins...