Separated by time but united by destiny, two headstrong heroines, 17-year-old Alais Pelletier du Mas (Jessica Brown-Findlay) from 13th century Carcassonne and modern day PhD graduate Dr. Alice Tanner (Vanessa Kirby) embark on a journey of peril, passion and adventure as they battle to protect the secret of the Grail. Set against the epic and historic landscape of southwest France, an all-star cast also featuring John Hurt, Sebastian Stan, Tony Curran, and Tom Felton bring to life the worldwide bestselling novel by Kate Mosse. This gripping and epic tale will have you captivated from the beginning to end as the true legend of the Grail is unearthed.

Alice is haunted by visions of Alais, and begins to believe their destinies are somehow connected. After her life is threatened, Alice discovers that evil forces are maneuvering to seize three sacred books that will reveal the secrets of the Holy Grail, and it is her destiny to do everything in her power to stop them.