Su Mian is haunted by a soul-stealing hairpin that devours her spirit night after night. She seeks only to reclaim the childhood memories erased from her. Lu Wujiao, trapped in a crippled body, forges the dead into a sword and closes in on her step by step, all to open the gates to the Soul Realm. The fragrance of Yin Qiniang’s medicine conceals lies, Mo Chen’s pupils reflect the turning points of fate, and beneath Yun Zhao’s jade token lies an unfulfilled vow. When the spirit within the hairpin whispers, “You and I were one all along,” they finally realize that this so-called path of no return is a sacrificial rite written thousands of years ago. But who is the true sacrifice?