Tushan Susu triggered a mutation in the Bitter Tree, and Bai Yue lost her memory in order to protect her from absorbing the power of the rampaging demon, and the peace was broken. Qing Li, an orphan of the White Fox tribe in Qingqiu, witnessed the tragic situation of his tribe being backlashed by the "bitter emotions" when he was young. He hated the art of rekindling the relationship. He sneaked into Tushan as a dashing swordsman to investigate the leak of the "bitter emotions". He had constant conflicts with the amnesiac Bai Yuechu, but he felt an inexplicable familiarity with Su Su.
The mysterious girl Bai Li appears. She is transformed by the spiritual power of the Bitter Tree and can read cause and effect. In fact, she is the "obsession body" split from Tushan Honghong. She hinted that Tu Shan Honghong's "obsession fragment" was hidden in Su Su's body, and Qing Li's family curse was actually closely linked to Dongfang Yue's sacrifice 500 years ago.
Bai Yue and Su Su took over the task of "Hell Matchmaker" to renew the relationship between a pair of human-male lovers, but they found out the truth behind Qingli's genocide. Qing Li approaches Bai Li in order to obtain the secret of rekindling fate, and is gradually attracted by his tenderness and pathos, but he does not know that he has fallen into a chess game in which Bai Li gathers the power of obsession.
When the truth is revealed one by one, Bai Li prepares a sacrifice to repair the tree of bitterness, and Qing Li is willing to disappear for her to atone for her sins; Bai Yue awakens Dongfang Yue's memory and restarts the reincarnation contract with himself. In order to awaken the remnant soul of Bai Yuechu, Tushan Susu took the risk of using "Bitter Love" at the cost of forgetting all memories with him.
In this journey full of sadomasochism and growth, the price of "bitter love" triggers deep thoughts on obsession and letting go, and the characters struggle in the whirlpool of fate.
