Back to 1996: An Errand Runner in the Major Crimes Unit

Chen Zhao, a veteran and a police detective with twenty-two years of experience, suddenly returns to 1996 and goes back home after leaving the military.

On his first day, he's forced into a blind date.

On the third day, his date is dead.

He gets dragged into a murder case that never happened in his previous life and is forced to prove his innocence. From then on, everything changes.

The people and events from his previous life are still there, but the relationships have changed.

The cases from his previous life still happen, but their outcomes are no longer quite the same.

This time, he won't passively accept what comes his way. He joins the criminal investigation team of his own accord, and, true to his original ideals, investigates cases, hunts down killers, and brings criminals to justice. Through his actions, he fulfills a detective's promise and protects the peace of his community.