Miller tells his daughter who Rodolfo really is. Rodolfo arrives and admits his deception but swears that his love is sincere. Kneeling in front of Miller he declares that Luisa is his bride. Count Walter enters and confronts his son. Drawing his sword, Miller defends his daughter and Walter orders that both father and daughter be arrested. Rodolfo stands up against his father and threatens him: if he does not free the girl, Rodolfo will reveal how Walter became count. Frightened, Walter orders Luisa to be freed.