Gary needs a lodger to help pay the mortgage on his flat. Unfortunately, neither of his lodgers seems to be able (or willing) to pay any rent at all!
First there's Dermot and then Tony. Both of these fall for Deborah, who owns the flat upstairs, but get nowhere.
Gary also has thoughts in that direction - his problem being the fact that he has a regular girlfiend, Dorothy, who he lives with!
Gary and Tony set out to celebrate Gary's stag night after Dorothy decides that it's time Gary showed ""real committment"" by marrying her. Gary suggests to Dorothy that buying a dog together might be an alternative!
The day of Gary and Dorothy's wedding arrives and both of them are having second thoughts. Tony, however, is ""on a promise"" if the wedding goes ahead.
Tony becomes obsessively jealous when he thinks that Deborah fancies another man. Gary and Dorothy, Tony and Deborah spend a weekend in a caravan out in the country. Gary is trying to give up smoking.
Gary, Dorothy, Tony and Deborah spend an evening watching television. At least, Tony tries to watch television. The other three seem hell bent on making Tony look like an idiot.
Tony tries to talk Deborah into making love in unusual places. He also has to try to make a good impression on Deborah's mother. Dorothy talks Gary into seeing a relationship counsellor.