Meryl and Milly arrive in a town that has completely dried up. They stop by the Cesar Mansion to ask about the whereabouts of Vash the Stampede, where they discover that Vash is already there, acting as a bodyguard for Cliff Cesar, a man who has monopolozed and sells the water in town. Vash was hired to protect a young lady named Maryann, the granddaughter of a wealthy entrepreneur. After finding out that Cliff is being threatened by a blonde man with a large silver gun, Meryl and Milly decide to stay at the mansion to find out if the man is Vash. During their stay, it quickly becomes apparent that Maryann is not what she seems.