When Holly Campbell’s body is found on the train tracks at Glasgow Central, police quickly rule it a suicide. She’d had a troubled past. She’d tried before. But Sergeant May Mackay can’t let one detail go.

If Holly never wanted to come home, why did she buy a return ticket? Driven by her own haunting loss and a promise to Holly’s grieving mother, May is determined to solve the mystery.

But the deeper she digs, the more sinister the truth becomes. Someone is hiding a terrible secret. And they’ll do whatever it takes to keep it buried.

Even if it means silencing May for good…