Day and Night

Getting back to the game, Guan Hongfeng rejoins the police department to help solve an ongoing series of gruesome murders.

Settling their differences, Hongfeng and Zhou Xun reach an agreement; Hongyu and Shutong indulge themselves at a club while looking for witnesses, to the dismay of others on the case.

Hongfeng closes in on the killer, but the killer closes in on him as well; Shutong practices her interrogation skill; Hongyu has a surprise visitor.

The encounter at Hongfeng's apartment turns violent; Shutong receives a commendation; a renowned gang member that Hongfeng and Zhou Xun arrested turns up dead.

Distraught on meeting the victim's daughter, details about her own family start flashing before Shutong's eyes; the team inspects the last place Qi Weidong visited before disappearing.

Liu tries to clear the air with Shutong, who in turn comes clean with Hongfeng; Hongyu ventures out, but the day doesn't go as planned.