In the spring of 1810 as the London Season is at its height. Bettina, the Countess of Fellsborough fears her husband is having an affair. Her husband, Harry, insists not. As they argue, she wishes that Harry could know what her life is like and he wishes his wife "could learn to trust him." Their wishes are granted and each must live in the other's body. It makes for confusion and comedy as understanding grows from heartache.