Parallel storylines from the past and present unfold in the southwest of France as ancient and modern-day conspiracies are unearthed, revolving around three hidden books that hold the secret of the true Grail. Alais and those closest to her must battle to protect the secret, while in the present day Alice faces a race against time to piece together her long-buried history.
Jessica Brown Findlay
Alais Pelletier Du Mas
Vanessa Kirby
Alice Tanner
Emun Elliott
Guilhem du Mas
John Hurt
Audric Baillard
Katie McGrath
Oriane Congost
Sebastian Stan
Will Franklyn
Tom Felton
Viscount Trencave
Tony Curran
Guy D'Evreux
John Lynch
Simeon de Montfort
Kate Mosse
Montsegur Guide
Janet Suzman
Esclarmonde
Matthew Beard
Sajhe
Jake Curran
Languedoc Parfait
Dominic Jephcott
Chris Brayling
Warrick Grier
Arnaud Domerque
