Time is running out for death row inmate Marcus Chen... Fifteen years after his conviction for a string of brutal murders, Chen makes a last desperate plea - not for mercy, but for justice. His letter lands on the desk of Detective Jack Morrison, the man who helped put him away. Now retired and haunted by doubts from his final case, Morrison can't shake the feeling that something was missed. With Chen's execution date looming, Morrison uncovers disturbing parallels between the old case and a series of recent killings. Each new clue suggests the unthinkable: an innocent man might die while a murderer walks free. Joined by Chen's daughter Sarah, now an investigative journalist, Morrison races against time to expose a web of corruption that reaches the highest levels of law enforcement. In a city where justice comes at a deadly price, Morrison must decide how much he's willing to risk to uncover the truth - even if it means destroying everything he once believed in. Some doors, once opened, can never be closed again.