Act Three. The wedding has taken place. Arturo and Lucia have retired to the bridal chamber. Raimondo interrupts the festivities in the Great Hall. He says Lucia is insane and has stabbed her husband to death. Lucia enters carrying a dagger. Her gown is smeared with blood. She acts disoriented. She imagines she is beside Edgardo, and soon to be married to him. She collapses and is carried away. Outside the castle, Edgardo learns that Lucia has died. He stabs himself, hoping to be united in death with Lucia.