Alain Deschamps finds a map and key in the flat of his murdered grandmother. It's been left for him. It leads him to southeast Asia where his father disappeared 30 years before; that and a nightmare awaiting him planned with godlike precision. As the body count of travellers mounts up around him he must figure the sinister motives of the ancient cult responsible for the killings, all the time dragged inexorably closer to the darkness of Black Dragon Mountain, deep in the Laotian highlands.