She signed the first autopsy report in the crematorium, but found birthmarks of childhood memories on the palm of the deceased. Forensic doctor Shen Zhao uses science as his blade to cut through layers of lies, but he doesn't know that he is stepping into the core of a serial murder case that was unsolved twenty years ago. The criminal investigation captain Jiang Lin relied on her report to solve the case, but secretly tracked every detail she avoided; the trainee assistant Chen Yan silently copied the palm prints of the corpse, and the fire of the old cook Lin Huai burned countless names that he did not want to say. When reporter Zhou Tang's posthumous letter revealed the truth, Shen Zhao finally understood: What she burned was not a corpse, but the truth that someone wanted to bury forever.