Yancheng Municipal Bureau is called in to handle a school bus hijacking--a bizarre crime, but seemingly an isolated one. Sadly, the police are unable to return one of the bus's young passengers to her parents. She's vanished without a trace. The schoolgirl's disappearance leads Luo Wenzhou and Tao Ran to reexamine a police investigation that took place twenty years earlier. That strange case seems to have haunted almost everyone who lived through it--especially Luo Wenzhou and Tao Ran's own mentor. Soon, it's impossible to overlook the fact that the school bus passenger wasn't the first young girl to go missing in Yancheng. On the contrary, girls have been vanishing into thin air for twenty years. And the next to go missing is one Tao Ran knows personally. Dealing with that bus hijacking already forced Luo Wenzhou to enlist Fei Du's help, and it seems he won't get a break from the petulant young scion anytime soon. The only way for Tao Ran and Luo Wenzhou to find this girl alive may be to follow Fei Du's instincts--however strange or disturbing they may be...