1915: War threatens to engulf the Inquisition as dark forces muster within the Catholic Church. Prior to his murder, a desperate priest sends a secret letter to his brother serving in the Italian Army. The young soldier carries with him this letter which holds the key as to why terrible satanic rituals are being committed. Drawn into this conspiracy and hunted by agents of The Darkest Hand, old rivals must put aside their differences to discover the contents of the letter before it's too late…