She is Lin Duwuya, a hypnosis prodigy in the field of psychology and a top-tier assassin. Betrayed by her adoptive father and shot several times, she took her last breath in an incinerator. When she opened her eyes again, she was standing at the counter of the "Yellow Springs Pawnshop." A copy of the Book of Yin, a Soul-Locking Bell, and a Soul-Cutting Scissors: these were the price of her life, bought with "a lifetime of peace" and "warmth in her eyes." The rules of survival are cruel and clear: she has only seven days left to live, and there is just one way to extend her life: help the dead move on and resolve their obsessions.
So Dr. Lin, an international PhD in psychology, quietly put up a second sign: Yellow Springs Psychology Clinic. The painted-skin opera singer's anxiety about her looks, the Echo Child's cycle of trauma, the Hungry Bride's twisted attachment... Each vengeful spirit is a difficult psychological case. She uses cognitive therapy to dismantle delusions and hypnosis to untangle the soul's wounds. With her Soul-Cutting Scissors in hand, she becomes a "soul surgeon" who walks between the worlds of the living and the dead. Every time she helps a spirit move on, the Book of Yin rewards her with a little more "living time," repeatedly tugging her back from the brink of death with every breath.
Her only "assistant" is her male best friend, Xie Jiuyuan, who is more beautiful than any woman. He's attracted to men, and his hobbies include collecting handsome men's phone numbers and making "furniture out of his enemies." He sobs and complains, "There's not enough of your ashes to make me a pair of dice," while using his Judge's Brush to stab evil spirits until their souls are scattered. He is her craziest shield, her sharpest-tongued anchor, and the only person in the clinic who knows that "the doctor" is walking a tightrope between life and death.
However, as the clinic's reputation spreads through both the living and the dead, more "clients" come seeking it out. And at last, her former adoptive father and the organization realize that the pawn they thought had already been reduced to ashes...