It's a double surprise for Trooper Leigh Abbott as she investigates a cold case and discovers two murder victims in a historic building. Together with forensic anthropologist Matt Lowell and M.E. Dr. Edward Rowe, she uncovers the secrets of a Prohibition-era speakeasy. But when the victims are discovered to be relatives — their deaths separated by eighty years — the case deepens, and suddenly the speakeasy is revealed as ground zero for a cascade of crimes through the decades. When a murder committed nearly forty years ago comes under fresh scrutiny, the team realizes an innocent man was wrongly imprisoned and the real murderer is still at large. Now they must solve three murders spanning over eighty years if they hope to set a wronged man free.