An immortal lord defies time for love, only to find his beloved has become his archenemy. Ten thousand years of reincarnation twist the threads of cause and effect. At the Jade Nectar Spring, he asks what his heart truly desires.
After returning from his trials, the heavenly immortal lord Fu Rong realizes he has forgotten a love that once seared itself into his soul. Three lifetimes ago, he was Ye Dingzhi, a man who loved the white-robed sword immortal Baili Dongjun. To reclaim the fate they lost, he defies the laws of heaven and forces his way into the river of time, only to be swept away by a temporal current into a world of conflict between humans and demons ten thousand years in the past.
In this era, demons rule and humans are treated as less than grass. Fu Rong meets the young Hongye: dressed in rags and covered in scars, yet with an unyielding fire in his eyes. Though his face is still young and his memories are gone, Fu Rong recognizes him at a glance. He is Baili Dongjun’s past life, and the future King of Ten Thousand Demons, destined to unite the demon realm.
At this point, Hongye is merely a human boy abandoned by his clan on the shores of the East Sea, struggling beneath the oppression of the demons. Concealing his identity, Fu Rong stays by his side and helps him cultivate with secret techniques from the immortal realm, vowing to change the tragic fate that will make him the Demon King and turn him against humanity. But the wheels of history are heavy: rumors that the Jade Nectar Divine Spring is about to appear stir the world, the demon clans prepare for battle, hidden “Awakened Ones” emerge among humanity, and the mystery of Hongye’s origins reveals a forbidden past that crosses species.
Fu Rong gradually realizes that his meddling in history is causing disturbances in time and space, while his beloved’s present and past lives struggle against each other within Hongye. When the Jade Nectar Spring, said to grant the ultimate fulfillment of desire, finally opens, everyone will face the cruelest test of all: Will they choose omnipotent power, or protect the purest wish in their hearts?