Guo Changcheng’s first day at the Special Investigations Department of the Public Security Bureau was certainly not what he expected; it started late at night when he had to go to HR, and later in the day he joined Director Zhao Yunlan for an investigation. During the investigation, while Zhao Yunlan had to drag around his useless nepotism intern, he meets with Shen Wei, a university professor who has his own secrets and to whom Zhao Yunlan feels undeniable attraction.