Imogen, the beautiful wife of barrister Evelyn Gresham, is facing the greatest challenge of her married life. Their neighbour Blanche Silcox, competent, tweedy, middle-aged and ungainly - the very opposite of Imogen - seems to be vying for Evelyn's attention. And to Imogen's increasing disbelief, she may be succeeding - for in affairs of the heart the race is not necessarily won by the swift or the fair.