The tortoise and the hare

Evelyn Gresham is a wealthy and successful man who has everything one could wish for, including a beautiful and devoted wife named Imogen. Their neighbour, Blanche Silcox, is a plain woman of 50 who rides, shoots, fishes and drives a Rolls-Royce - in every way the opposite of his wife. But Evelyn is irresistably attracted to her.