Martha Strangeways is struggling to find purpose in her life, after giving up her career as an investigative reporter when her young twins died in a house fire. Overwhelmed by guilt and grief, her life changes when she stumbles across the body of a missing teenager – a tragedy that turns even more sinister when a poem about crows is discovered inked onto his back...

When another teenager goes missing in the remote landscape, Martha is drawn into the investigation, teaming up with DI Derek Summers, as malevolent rumours begin to spread and paranoia grows. As darkness descends on the village of Strathbran, it soon becomes clear that no one is safe, including Martha…