Emily is a master chef at a trendy Boston restaurant. Her passions are food and her husband, Ross, a straight-arrow architect. Her twin sister, Philippa, is a campy Hollywood film star. Philippa's passion is men, and she's having a top-secret affair with Ross's partner and man-about-town, Dana. When Ross spots Philippa with Dana and thinks she's Emily, the zany mix-ups begin. And so do the murders.

First to die is Dana, keeling over after a gourmet meal at Emily's restaurant - right into his black currants and cream. But the killer may have been after Philippa, and now she's running scared. As she and her sister take to the streets of Boston, New York, and Hollywood to find the murderer, they begin checking off an intriguing menu of suspects.

Now to save their own lives, these two smart cookies cook up a brilliant scheme of juggling husbands, lovers, kitchen help, the Hollywood media, and their own identities. But when dead bodies turn up everywhere and bullets start flying, they may go off half-baked...and it's only a matter of time before the final course, which is, naturally, a real killer.