This play is based on story told in Cervantes' Don Quixote, and some believe it is a reconstruction of a lost play by Shakespeare and Fletcher. Duke Angelo and his son Roderick are concerned about the activities of the duke's younger son, Henriquez. They enlist his friend, Julio, as a spy. Before Julio left for the court, he foolishly asks Henriquez to secure his marriage to Leonora. Summary by Libby Gohn