Labyrinth is a British miniseries based on the 2005 novel of the same name by author Kate Mosse. The mini-series establishes a connection between Alice Tanner, a post-graduate student in 2012, and a teenage girl, Alais, who is present at Carcassone during the Crusader assault in 1209. In the past, Alais, is chosen to protect the Three Books of the Grail, which hold the secret to immortality. In the present, Alice is drawn into a search for the books by individuals who will stop at nothing to achieve their goals. A German-South African co-production, the two-part series was filmed on-location in the medieval town of Carcassonne in southwest France and Cape Town, South Africa.
The miniseries follows two women, medieval Alaïs Pelletier du Mas (Jessica Brown Findlay), who lives through the Crusades and Cathar massacres in medieval France, and modern-day Alice Tanner (Vanessa Kirby), in their quest to find the Holy Grail. Alice, a volunteer at a French archaeological excavation, discovers the skeletal remains of two people in a cave, as well as a labyrinth-engraved ring, which attracts the attention of unscrupulous individuals. In 1209, newly married Alaïs is living in Carcassonne, a stronghold of Cathars who have been declared heretical by the Church. Alaïs and her father are protecting three sacred books that reveal the secret of the Holy Grail from the Crusaders.