Mistaken for a thief while chasing a demon, Wu Zhen flees into the Ruyi Pavilion. Meanwhile, Mei Zhuyu, a newcomer to Chang'an, faces cold sarcasm and ridicule. Ultimately, Wu Zhen sees through the demon's disguise and successfully captures the bat demon.
Wu Zhen and Mei Zhuyu investigates Bi Tao, Mei Zhuyu disperses the swarm of bats. Wu Zhen transforms into a cat, hiding her identity.
Mei Zhu Yu and Mei Si chat about Wu Zhen's past. Mei Si advises Mei Zhu Yu to steer clear of her. Wu Zhen and Mei Zhu Yu search for the Undecaying Bone at a jewelry shop, but it manages to evade their grasp again and again.
Wu Zhen joins hands with Liu Tai Zhen. She pretends to be frightened by the shadow demon. The shadow demon burned herself to death after Xia Lou Bai's betrayal. Wu Zhen and Mei Zhu Yu are overcome with emotion.
Wu Zhen retrieves the Undecaying Bone. Liu Tai Zhen and the elders of the Four Sects join hands to destroy the Undecaying Bone, but they fail. They realize that it's the remains of a sinister fiend.
Wu Zhen and Mei Zhu Yu go to the mountains. Wu Zhen accidentally sprains her ankle. Mei Zhu Yu carries her on her back. Meanwhile, Mountain Specter and Elder Gray scheme to kill Wu Zhen to prevent her from obtaining the Lightning Wood.
Wu Zi Shu, angered by Elder Gray's attack on Wu Zhen, secretly subjects him to torture in the Demon Prison. Though Wu Zi Shu is repeatedly summoned by the Undecaying Bone, he cannot discern its intent. Elder Gray, realizing Wu Zi Shu must be connected to the Undecaying Bone, hints that one day they may walk the same path.
Mei Zhu Yu rushes to the ancestral hall to look for Shuang Jiang. He runs into Wu Zhen. Wu Zhen asks Mei Zhu Yu why he's avoiding her.
Mei Zhu Yu and Wu Zhen discover that the so-called demon is in fact Princess Yuan Zhen. Wu Zhen saves the White Camellia Spirit from danger by eliminating the poisonous moths. Although Mei Zhu Yu knows the White Camellia Spirit is a demon, he takes pity on the true love between him and the princess, and chooses not to capture him.
Using the heavenly thunder, Wu Zi Shu, Wu Zhen, and the rest finally destroy the Undecaying Bone. Wu Zi Shu faints from the shock and recovers his memory with the sinister fiend. The suppressed core on Wu Zhen's chest starts to act irregularly due to the demonic powers.
Wu Zhen exhausts her powers to treat Mei Zhu Yu and allows him to stay until he fully recovers. Rumors about Wu Zhen and Mei Zhu Yu start spreading.
Elder Gray issues a challenge of a Deathmatch to Wu Zhen. On the night of the new moon, under an ominous sky, all demons in the Demon City gather to witness their battle.
While searching for the demons, Mei Zhu Yu arrives at Yunong House, located across from the Skin Shop. At the same time, Wu Zhen is inside the shop, repairing a crack in the barrier.
Wu Zhen invites Mei Zhu Yu to admire the blooming flowers at the western suburbs. Mei Zhu Yu tells Wu Zhen why he's been avoiding her all along.
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