Paul and Marsha Hatfield have been living with his mother since they got married and they dream of having a house of their own - but they can't afford it. Murray and Diana are unmarried and would like to live in their own home as well but they have the same, frustrating dilemma. When the two couples discuss the situation they decide to pool their resources and buy a house together. The financial partnership seems to have solved both their problems but the living arrangements prove to be less successful as Paul and Murray are total opposites!