Impoverished Philadelphia heiress Nora Blackbird has agreed to wed Mick Abruzzo, son of New Jersey's most notorious mobster, leaving the city's bluebloods in shock. Then Nora and her sisters get some ominous news—Sweet Penny Devine, ex-Hollywood starlet and daughter of the Philadelphia Devines, has mysteriously disappeared. Even stranger, her family wants her declared dead pronto. Could someone have plotted her final act? Now it's up to the Blackbird sisters to snoop among the snooty—until they uncover the truth.