While Underdog is in the hospital for his pain that puzzles the doctors, word of his plight reaches Riff Raff who sees this as an opportunity to steal the Excalibur Sword Collection that is being shown in the San Francisco museum. As night falls on the museum, Riff and his henchman, Mooch, emerge from being hiding in medieval costumes. When Riff lifts the casing to the Excalibur collection, he trips an alarm and the police come. Riff and Mooch defeat the police by landing a chandelier on the police when they gather in the center of the room to trap him. They then steal the Excalibur Sword collection.