The story begins with the reincarnation of two souls of the Emperor of Heaven, one good and one evil. One soul turns into the God of War Changsheng, but can dig out the heart of immortality; the other soul turns into Yunhuang, who is imprisoned by the Hades in the Demon Clan's Youyun Hell for a hundred years, suffering from the Soul Devouring Nail every day. Conspiracies and tricks follow one after another, leading the two souls to kill each other. The divine beast Cheng Huang turns into a smart girl to seduce the God of War, kills the God of War for Yunhuang, and takes away the Yuming Heart of his lover Changsheng, but learns that Changsheng took the initiative to suffer the tribulation of giving up his heart for love. The love entanglement between the three is physically and mentally abusive, unforgettable, and involves a relationship between the Emperor of Heaven and the divine beast Cheng Huang a hundred years ago. The seal of the underworld is lifted, the demon soldiers are born, and the lives of the people are in turmoil. What is the hidden story of the Demon Clan's purgatory? Can the two souls of the Emperor of Heaven return to their positions after a complete tribulation?