It's been four years since Lydia Harris last spoke to her elder sister, Adele. When Adele telephones from Rome and interrupts Lydia's work as a nurse at the Santa Monica Emergency Hospital, she's more than a little surprised—and curious. Adele explains that she sent a parcel to Lydia, and after Lydia receives it, she must come to Rome at once. Disturbed by her sister's cryptic message, Lydia is further puzzled when the parcel arrives containing...