Ben Hope lives on the edge. A former elite member of the SAS, Ben is tortured by a tragedy from his past and now devotes his life to finding kidnapped children. When Ben is recruited to locate an ancient manuscript which could save a dying child, he embarks on the deadliest quest of his life. The document is alleged to contain the formula for the elixir of life, discovered by the brilliant alchemist Fulcanelli decades before. But it soon becomes apparent that others are hunting this most precious of treasures - for far more evil ends. When the secrets of alchemy hidden within the pages remain impenetrable, Ben teams up with beautiful American scientist Dr. Roberta Ryder to crack the code. It seems that everyone - from the Nazis during WW2 and powerful Catholic organisation Gladius Domini - wants to unearth the secrets of immortality. The trail leads Ben and Roberta from Paris to the ancient Cathar strongholds of the Languedoc, where an astonishing secret has lain hidden for centuries...