When Rattles and his mom are invited to stay at her boyfriend, Archie Vanderloo's, house for a weekend, Rattles is worried about fitting in with Archie's twin kids, Angie and Ansel. Angie speaks in weird slang that Rattles can almost never understand, while Ansel is overly competitive. The rest of the Tough Customers try to help Rattles prepare for his visit. Arthur and D.W. want to give their parents a vacation, so they suggest that they sit outside and relax. As chaos slowly builds up inside the house, Arthur is determined not to ruin their vacation by calling them for help.