Ex SAS survival expert Johnny Mason's dark furtive existence as a salmon poacher falls apart, to reveal a complex web of treachery, lies and double-dealing in his home village, Glenstone. Faced with adversity on all sides and trapped between wild savage gangs, and avaricious landowner's, gamekeepers and the law, he sees no way out. Battling against all odds, Johnny meets a pretty young scientist, who warns of a dire ecological catastrophe. Then long-lost cousin Will turns up and his world is brought perilously close to the edge.