Rome, 1948. Twenty women are brutally murdered, their throats slit and their faces removed with surgical precision. Then the murders stop as abruptly as they started, and the horrifying crimes and their victims are lost to history. Now over sixty years later, the killings have begun again. This time in America. It's up to homicide detectives Marcus Carter and Angela Darden to stop the murders, but how can they catch a serial killer who leaves no traces of evidence and no apparent motive other than the thirst for murder? The only cryptic clue they have to go on is the three letters "MAI" the killer carves into the flesh of his victims.