Those are the only words on the phone call. Then they hang up. Surely, a prank? A mistake? A wrong number? Anything but the chilling truth... That someone is watching, waiting, ready to take your life in one hour. But why The job of finding out falls to DI Helen Grace: a woman with a track record in hunting killers. However, this is one case where the killer seems to always be one step ahead of the police and the victims. With no motive, no leads, no clues - nothing but pure fear - an hour can last a lifetime....

A silent killer stalks the city, targeting those home alone at night—killing without pity or remorse. As panic spreads, Detective Inspector Helen Grace leads the investigation, but is herself a hunted woman, her every step dogged by a ruthless killer bent on revenge. As she tracks the murderer, Grace begins to suspect there is a truly shocking home truth that connects these brutal crimes.

There is a sickness in the forest. First, it was the wild horses. Now it's innocent men and women, hunted down and murdered by a faceless figure. Lost in the darkness, they try to flee, they try to hide. In desperation, they call out for help. But there is no-one to hear their cries here.... DI Helen Grace must face down a new nightmare. The arrow-ridden victims hang from the New Forest's ancient oaks, like pieces of strange fruit. Why are helpless holidaymakers being targeted in peak camping season? 

A woman's body lies in the road. At first it looks like a tragic accident. But when Helen Grace arrives on the scene it's clear she's looking at a coldblooded killing. But why would anyone target a much-loved wife and mother?

Hiding her personal connection to the victim - and a double-life which must remain secret at all costs - Helen becomes a woman possessed, working her team around the clock to chase down every lead. As the killer strikes again, the investigation takes its toll not only on Helen but also her senior officers. Tempers flare, friendships fray and Helen faces an impossible choice. Confess her sins and lose control of the case? Or keep living a lie, protecting her darkest secrets, and risk getting trapped in this tangled web?