Special Case Unit 406

Du Feng, an outstanding student at the Yun'an Provincial Police Academy, loses the woman he loves to a bizarre death during their graduation assessment. Two years later, a series of inexplicable deaths rocks Yun'an Province. Bian Xue, director of the Provincial Public Security Department, orders the formation of Special Task Force 406. Liu Qi, a psychology professor at the Yun'an Police Academy, strongly recommends that Du Feng join the team.

The task force is led by top special forces soldier Du Ao. It also includes China's answer to Conan Doyle, Du Feng; Zhang Jingtao, an instructor to the armed police; the alluring Miaojiang descendant Pan Diemeng; trace evidence expert and micro-expression specialist Wu Chaofei; top hacker and hardcore gamer Chen Yeli; and cold-blooded sharpshooter Xia Yuandong. One horrifying case after another strikes: a uniform fetish, bloodthirsty white wax, a courtesan, a human body jigsaw puzzle... The Provincial Public Security Department brings together its best and brightest in the task force to clear away the fog, find the truth, and expose the vicious hearts lurking behind the pursuit of profit. As the mysterious figure in black appears and vanishes, and Du Feng struggles with fragmented memories of two years ago, can he uncover the truth with the help of his teammates? And can he awaken the long-buried secret of his origins?