When medical examiner Yarra Lin meets detective Kelsey Song, what starts as a fiery clash between them gradually turns into a deep connection and partnership. Together, they bear witness to the lives of a host of ordinary people: an innocent girl who died unjustly, an elderly mother waiting in the mountains for her criminal son to return, a timid rookie cop who risked his life to confront an armed robber... They fight for justice for the living and give a voice to the dead, uncovering countless hidden truths along the way.