Luke Jones, his wife Sofia and beloved son Max are hiking in a remote Scottish forest when they stumble across the body of a murdered woman. They're even more terrified when the killers reappear, guns in hand.

Managing to flee, they each get separated in the dense woods - with Luke stumbling and knocking himself unconscious. When he wakes, there's no sign of Sofia and Max. But when his phone starts ringing, the nightmare really begins...

Luke will do anything to save his wife and son. But, as a pawn in a deadly game which drags up his buried past, can he even save himself?