Unnatural Death

A typical traffic accident on the outskirts of the city: a man hit, a trail of tire marks on his clothing — the case is almost closed. But forensic expert Liu washes the blood from the victim's face and recognizes him.
On the asphalt lies Lao Zhao — his colleague. The phone and wallet are missing, a strange symbol is drawn nearby: the hieroglyph for "mouth". The last clue — or a trap?
As the investigative team tracks down a person with Lao Zhao's phone, it becomes clear: this is not an accident, but a carefully orchestrated revenge. And in this game, the truth may turn out to be scarier than any confession…