Shi Zichen

560 AD. In the thirty-seventh year of Jiajing's reign in the Ming Dynasty, the power of eunuchs was overwhelming. To improve the power of yin and yang, the Feng Shui Master decides to create a tiger arena in the center of the capital. But a strange virus infects animals and now hundreds of mutant tigers are breaking out into the streets and drowning the city in blood.

Mu Xia is a talented locksmith. While dealing with a strange murder case within a locked room, Qin Zuo Man inadvertently discovers that Mu Xia is the new security consultant hired by the police academy. As more locked room cases arise, the simple-minded Qin Zuo Man, the monotonous Mu Xia and celebrity cop Tan You join hands to form an investigative team that seeks to uncover the truth through every door.