A horrific murder rocks the lives of two families living side-by-side in isolated rural Scotland.

Childhood sweethearts Adam Elliot and Grace Douglas, who have returned home from their honeymoon and are found brutally murdered. Their families and neighbors in the remote Scottish Highland village of Braeston are devastated, but things take an even darker turn when a badly injured man arrives at their doorstep after his car comes off the road - a man who seems to be the killer.