SUSAN HILL - The Vows of Silence

A gunman is terrorising young women.

What links these seemingly random murders? Is the marksman with a rifle the same person as the killer with a handgun? Or do the police have two snipers on their hands?

Detective Chief Superintendent Simon Serrailler is in charge of the case, but is struggling to cope with a tragedy at the heart of his family.

The pressure is mounting...