On Guard is a 1997 French swashbuckler film directed by Philippe de Broca and starring Daniel Auteuil, Fabrice Luchini, Vincent Perez, and Marie Gillain. Adapted from the 1858 historical novel Le Bossu by Paul Féval, the film is about a skilled swordsman named Lagardère who is befriended by the Duke of Nevers. When the duke is attacked by his evil cousin Gonzague, the duke in his dying moments asks Lagardère to avenge him and look after his infant daughter.