Jane is invited round to dinner by Bill, a good-looking man she met in the bar. She decides to make a lasting impression by turning up wearing nothing underneath her cute little trenchcoat. Unfortunately, on arrival she discovers not a romantic dinner for two, but a dozen other guests.

Meanwhile, Patrick is locked in insane competition with Ivan, an acquaintance from work. Ivan has a glamorous trophy wife, so Patrick decides he needs one too, just for the evening. He recruits Sally for the part, then changes his mind and claims Susan for his 'bride' (he 'needed a blonde'). Seeing Susan pretending to be Patrick's wife finally makes Steve's mind up for him: he proposes to Susan in front of the whole group, and she accepts.