Two thousand years ago, a couple was killed. The flower the wife wore on her temples became stained with blood and turned into a demon, named Yi Zhi. Yi Zhi was determined to find the reincarnation of the couple and help them renew their relationship, but he accidentally fell into the human crusade against monsters and was trapped in the Tomb of Ten Thousand Monsters for thousands of years. Thousands of years later, the Tomb of Ten Thousand Demons collapsed, and Yi Zhi regained his freedom. Ou saved Yan Er. The two went through life and death several times, and made new friends of humans, Buddhas, monsters, and ghosts. They thought their lives were peaceful, but they didn't want the storm to strike again. An old friend seeks revenge, and the shocking secret behind Yi's life experience is revealed.