In the modern city, there is an unknown inner world hidden. The heroine Lin Qiyu is a special genetic experiment created by the secret organization "Ark". She has a pure soul and powerful power to heal and purify all evil spirits. However, she has a simple and kind heart and has the feelings of the "Mother" who can save all living beings. The male protagonist Mo Ye is an abyss lord who accidentally fell into the world and had his power sealed. He is cunning, cruel and indifferent to all emotions. In order to regain his strength and return to the abyss, he disguised himself as Mei Qianghan, who had been eroded by evil forces, and deliberately approached Lin Qiyu, using her kindness and love to make her willingly purify the evil spirit for him and restore his strength.
On the day when Mo Ye's power was completely restored, he mercilessly sacrificed Lin Qiyu as the "final sacrifice", opening the way back to the abyss. He thought it was just throwing away a handy tool, but he didn't expect that this sacrifice accidentally broke the final shackles in Lin Qiyu's genes, allowing her to be reborn from Nirvana as a "Saint of Healing" to a "God of Judgment", gaining the authority to judge and purify all demons.
After rebirth, Lin Qiyu's temperament changed drastically, becoming cold and powerful. She began to take "purifying the world" as her own responsibility and conducted indiscriminate trials on all monsters, which directly shook the foundation of Mo Ye's rule. After Mo Ye lost her, he realized that her breath had been engraved in his bones. The emptiness and regret made him almost crazy. As a result, the formerly aloof Demon King embarked on an extremely humble and never-ending road to pursue his wife, but he faced his predecessor who had become a god and regarded him as dust.