Indistinguishable from normal people but possessed of supernatural powers andcapable of entering the Twilight a shadowy world that exists in parallel toour own ... » 

Indistinguishable from normal people but possessed of supernatural powers andcapable of entering the Twilight a shadowy world that exists in parallel toour own each other owes allegiance either to the Dark or to the Light. Whileon holiday in Scotland visiting The Dungeons of Edinburgh a young Russiantourist is murdered. «