At first their ages made no difference... Julia Hunter and Kate Bain have found true happiness with men old enough to be their fathers. Julia organises her husband Hugh and their cherubic twins with ruthless efficiency and Kate has lived with James, for eight years, and although she refuses to marry him, she's apparently devoted to him. Hugh and James, lifelong friends, feel blessed indeed. But age differences cannot be ignored forever and when James accidentally knocks a fiercely independent spinster from her bicycle a chain of events is set off in which many suppressed discontents and frustrations emerge. Kate begins to seek out friends of her own age and Julia's career begins to blossom just as her husband's starts to decline ... The tranquil lives of the men and the girls seem shattered as new relationships develop and old anxieties surface.