When terrorists use a drone to bring down a plane on one of London's busiest shopping centres, it ignites a chain of events that will draw in the innocent and guilty alike.

DC Max Wolfe finds himself caught in the crossfire in a city that seems increasingly dangerous and hostile.

But does the danger come from the murderous criminals that Max is tracking down? Or the people he's trying to protect?

Or does the real threat to Max lie closer to home?