After arriving at the casino where they're staying, Beavis and Butt-Head are arrested by security. But then they're taken to their rooms. Their room was purchased by Muddy to be next to Dallas' room. The two boys come in. Dallas then realizes they have no idea what they were hired for. Beavis and Butt-Head begin fighting over who will "do" her first. Dallas gets arrested by police. But she thinks fast, and plants a stolen biological weapon, the X-5 Unit, in Beavis' pants just to get rid of it.