The Partridge house just doesn't seem big enough -- they need more bathrooms and just more room in general! Reuben takes Shirley to look at a new, larger house. The Partridge house is home to her, so Shirley doesn't really want to move, but all the kids are very anxious too. They put their house up for sale, with Reuben acting as real estate agent. After a week without even one looker, Reuben and Danny cook up a scheme for open house with the Partridge Family. The open house is like a carnival -- hundreds of people show up. As the family overhears various disparaging remarks about their home from the visitors, they begin to realize just how much the house means to them. Just as the kids tell Shirley that they don't want to move either, Reuben arrives with the news that he's sold the house. When the buyers, Mr. & Mrs. Sharp, come to look the house over, the kids sabotage the plumbing, the doors and the windows to make it seem like the house is falling apart. They confess that they did it because they don't want to move, but the Sharps still want the house and they've signed the papers. With two weeks to move, they learn that someone else bought the new house, so if Reuben can't manage to get it, they have nowhere to go. The Sharps arrive with the news that they don't want the house -- everyone sees through their reasons and realizes that they'd feel bad if the kids had to move against their will. Reuben ruins the happy moment with the news that he has managed to buy the other house. He makes a deal with the owner to release them from the contract if the Partridge family will entertain at his son's birthday party; so, the Partridges get to keep their home after all.