Paul and Marsha have been married for 3 years and would like their own place. Murray and Diana are unmarried and also want their own place. However neither couple can afford to buy on their own so it seems that the solution for both couples is to move in together.
Life should be bliss for Paul and Marsha now that they are not living with his mother any more. However, Paul's mother keeps coming round and trying to take over. But Murray thinks he has a solution which can't fail.
For a man who doesn't approve of gambling, Paul is playing for high stakes. Meanwhile, Diana is playing her own game in her efforts to get Murray down the aisle.
A computer is enlisted to help Paul prove that he is a better housewife than his wife. However, the computer can't explain Murray wearing a dress, or whether he is a thief.
Murray has a lot of questions to answer - who does the dog in the house belong to? Why is he anxious that everyone should leave the house? And most importantly, why is there a naked woman in the living room?.
Murray always takes Diana for granted, something that Paul is quick to point out. When Giles appears on the scene, Murray realises that he has competition and he starts to change his ways - he even contemplates the ultimate sacrifice.
It's finally happened, Murray is about to make an honest woman of Diana but he is regretting one thing - making Paul the Best Man. His worst fears are confirmed when Paul insists on turning up for the wedding in his birthday suit.