A strange series of ritual murders in various parts of the world alarms the United States government because of its destabilizing potential in hot areas of the world. Due to the characteristics of the events, the authorities contacted the Bluthund Community, a private organization made up of experts in unconventional disciplines. Certain keys in common to the crimes lead investigators to the trail of the Sect of the Nizaris, created in the Middle Ages in Persia by a mysterious "Old Man of the Mountain", reported by travelers such as Marco Polo and stories from the time of the Crusades. The assassins that formed it had terrified the kingdoms of the Middle Ages of the Near and Middle East. Bluthund investigators travel to the ruins of the mysterious Castle of Alamut, located in present-day Iran. There they find with amazement that the sect is still active and must confront the fearsome assassins who guard their sacred site. A historical thriller that will keep the reader on edge from start to finish.