At three o'clock in the morning, in an abandoned factory, a corpse with a peaceful expression but all its internal organs was completely dissolved, dragging forensic doctor Su Mu into a serial mystery that spanned three years. The rare plant toxins in the fingernails of the deceased were exactly the same as the cold case files that her father, former forensic doctor Su Mingyuan, handled during his lifetime.
The appearance of criminal investigation captain Lu Ting broke Su Mu's solitary rhythm. He was as sharp as a knife, but he would remember that she only drank black coffee; she was as calm as ice, but when he stood in front of her, she tasted heart palpitations for the first time.
As mysterious invitations to the "Qinglan" teahouse appear one after another, the victim and the "Qinglan Project" from twenty years ago surface. Su Mu discovers that her father's "car accident" was no accident, and the scalpel she holds tightly will not only cut open the lies of the corpse, but also cut open the past that she dare not touch.
When toxins and conspiracies are intertwined, when trust and love grow in crisis, can they use the "language" of corpses to piece together the truth in this city swallowed by secrets, so that the sleeping sin and the deeply buried love can be brought to light together?
