But nothing about the case is simple. How does a woman on a train simply vanish? What do you do when a trail runs cold and the pressure is on?
Before long the perpetrator has another target: DCI Gillard himself. What if the detective isn't just running the case, but is part of it? The victim merely a lure for a bigger fish.
The answer is under the bridge. The chilling setting for the biggest challenge of his life.