A city on the brink. A mother on the edge. A nightmare that only DI Helen Grace can end. Sometimes, the darkest secrets hide in plain sight...

A gang war grips the city, and the police force is under fire from all sides. But Detective Inspector Helen Grace defies direct orders as she becomes drawn to the case of a missing teenager.

Naomi's mother is desperate for help - and Helen is her only hope. Keeping the investigation secret, she finds a disturbing trail of questions - and more who have vanished off the streets...

Sometimes, the truth hides in plain sight. But proving it is another matter entirely. The clock is ticking - and the only person looking for Naomi is about to meet her match.