Cold case detective Lauren Riley wakes up in the hospital certain of two things: she was stabbed and left for dead...and the person who did it was a cop. After being brutally stabbed at her desk late one night, Lauren Riley works her way backwards through the haze to piece together who attacked her and why. A mysterious phone message forces her to enlist the help of a retired lieutenant to track down a witness who is desperate not to be found. As she digs into the Buffalo Police Department's hidden past she uncovers a terrible secret, one a fellow officer would kill to protect.