Terror grips the city. In a series of brutal murders, three young women have been killed on or around the subway, and panic spreads through the transit system. To make matters worse, one of the investigating detectives is a suspect. Detective Inspector Ian McBriar and his team need to track down the real killer before more lives are lost. The one thread that links the deaths together is a thin one, and the only thing the murders have in common is a thing that makes no sense. This may be Ian's last case; ghosts from his past, and a possibility of a better future, could change his life.