Hunting Killers by Night, Dawn Breaks by Day

A carefully orchestrated massacre leaves carefree, pleasure-loving Xie Hongyu branded a fugitive. Forced to hide wherever he can, he lives in constant fear. His twin brother, Xie Hongfeng, captain of the criminal investigation squad, is torn apart by conflicting feelings. He believes his younger brother is innocent, yet he must contend with pressure from the police force and the rules requiring relatives to recuse themselves from a case.

Outraged, Xie Hongfeng resigns and secretly teams up with his brother, Xie Hongyu. One works by day, the other by night, as they return to the police force under the guise of “external consultants,” taking turns playing the same role to investigate the truth.

By day, the courteous and meticulous Xie Hongfeng draws on his expertise and experience to help solve cases. By night, the irreverent and nimble Xie Hongyu sneaks into the police station to secretly investigate the files on the massacre.

The brothers repeatedly risk giving themselves away, and danger lurks at every turn. Acting squad captain Yang Guangyao and the other officers could expose them at any moment. As their investigation deepens, they uncover a vast conspiracy behind the massacre, involving corruption within the police force and collusion with criminal gangs. Step by step, the brothers close in on the mastermind and face off against the forces behind it all.

In the end, they expose the truth and bring the killer to justice. Xie Hongyu is cleared of the charges, and the brothers reconcile. But they pay a terrible price: the carefree life and upright innocence they once knew are gone forever...