He is the most silent forensic doctor in the police station. He has been talking about corpses for ten years and is called the "living autopsy instrument" by his colleagues. But no one knows that every corpse he dissects points to the same unsolved serial murder case - and that murderer is the best friend he personally sent to prison ten years ago. When the unique autopsy mark he left behind appears at the scene of a new case, Shen Yan is forced to face a horrifying truth: he is not chasing the murderer, but cleaning up evidence for the murderer. The surveillance inside the police station, the missing evidence, the abnormal eyes of his boss... Every step seemed like someone was secretly guiding him towards the abyss. This time, he must uncover the bloody truth behind his ten years of lies before he is regarded as a murderer.
