The dark, twisted pasts of a female detective, a rookie cop, a politician, and a wanted criminal all collide when a murder takes place that looks exactly like an unsolved case from 23 years before.
After discovering that a brutal murder has similarities to a cold case from three years before, lead detective Xu Zi-Wei, rookie policeman Chen Jia-Hao, and a young, promising legislator, Yang Qi-Xiao, are drawn into a dark labyrinth of power plays.