Three years ago, before serial killer Gu Jing was captured, she entrusted her daughter to Shen Du, the police detective who had been pursuing her. Three years later, Shen Du, now with a head of white hair, watches over the child as she grows up. The year she turned three, she drew a picture: nothing but white hair, with no face. She said her father's face was hidden beneath his hair, so she couldn't see it. And the code Gu Jing left behind is waiting for her to crack it.
