1941. An ancient castle is lost in the mountains of Romania, where the German garrison is suffering losses that cannot be explained solely by the actions of partisans. Whose teeth or claws leave marks on the throats of victims? Are the notorious Transylvanian vampires really not the invention of medieval dreamers? F. Paul Wilson is a popular American writer, a master of unpredictable plots and exciting mysteries. Each of his new novels instantly becomes a bestseller and is translated into many languages. The total circulation of his books has already exceeded twenty million copies worldwide.