PORTUGAL, 1705. In the dungeons of a Templar castle, a dying old man bequeaths an ancient half-burned book to his young inquisitor. Keeping one step ahead of those who would kill to wrench the book’s secret from his hands, the inquisitor turns his back on his calling and sets off on an impossible journey to compelte the old man’s quest.
Hunting for a mysterious bioweapons scientist, an army unit discovers a concealed state-of-the-art lab where gruesome experiments have been carried out on men, women, and children. The scientist escapes, but a puzzling clue is left behind : a circular symbol of a snake feeding on its own tail.