Huyao Xiao Hongniang 4: Qian Yan Pian

Yan Ruyu is a demon who mastered Tushan's art of changing appearance and used it to become a notorious thief of hearts. While fleeing the law, he meets Lü Jianwen, a demon catcher whose extraordinary sense of smell allows her to recognize him no matter what face he wears.

Her pursuit gradually reveals that Yan Ruyu is capable of changing more than his appearance. Their feelings lead to a promise beneath the Tree of Bitter Love, but reincarnation separates them. In the present, Bai Yuechu and Tushan Susu become involved when old enemies return and the bond between hunter and fugitive must be awakened once again.