Beneath is a short film co-produced by Almo Film and the City of Cannes, written and directed by Morgan le Faucheur, with the collaboration of world champion freediver Guillaume Néry. The film reveals the Cannes underwater Eco-museum by Jason deCaires Taylor through the legendary tale of the Man in the Iron Mask, who was detained in the royal prison of the Island of Sainte-Marguerite in Cannes during the 17th century, and whose identity, still unknown, has fed the imagination of artists for more than three centuries.