Four well-developed and ambitious police school graduates, Ma Xiaoshuai, Ou Jie, Zhao Jiahui, and Yang Yiliu, push for their goals and fight against the struggles.
Zhang Haowei , Jing Chao , William Tim , Zhang Yujian , Lu Zhuoran , Hong Jiantao , Zhang Zhihua , Isabelle Wang , Feng Guoqiang , Liu Hui
