Amanda was looking forward to her family camping holiday in a remote Scottish valley. But as soon as she arrives with her family she senses that something is wrong. Then Amanda notices mysterious shadows flitting across the mountainside and strange scratches on her brother, Grant. When an eccentric local man warns her that she should leave, Amanda starts to believe that something is stalking her family in the valley of the shadows. Soon she realizes her worst nightmare has become a reality, and that she must fight to protect those she loves.