When you think you're safe,
When you think you're all alone,
That's when he'll come for you...

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...