Rich and stylish Dianne Stark has it all: good looks, wealthy husband, cute baby, Fifth Avenue apartment. So why is she suddenly restless and anxious, hinting at secret troubles?

Lady Margaret Priam suspects her friend is the victim of an overactive imagination. But when Dianne's look-alike sister is murdered, Lady Margaret decides to do some mannerly snooping. As she canvasses her social connections--including Dianne's current men friends--and searches for a shadowy ex-husband, she meets a Dianne she never knew. And exposes a criminal where she least expects it. . . .