A FRIDAY NIGHT Karl and his daughter Leah are on their weekly evening stroll through Crystal Palace Park.
A HOODED FIGURE From out of the shadows, a figure wearing a blank mask ambushes them, armed with a large knife.
A CHOICE TO MAKE Karl is forced to make an impossible decision: stay and die, or walk away from Leah with a knife at her throat and the promise that they will both survive. Could Karl ever live with himself if he left his daughter? Does he really have a choice?
Soon, more seemingly unconnected and innocent people across London are offered a deal in exchange for their lives. DI Alex Finn and DC Mattie Paulsen must hunt for a killer that appears to have no face, no motive and no conscience before more victims’ blood is spilled.