Who Killed Rosie Sunset?

Why would anyone kill sweet old Rosie Sunset, who sold maps to the movie stars homes? An heiress who was seen giving Rosie a ride, Rosie's neighbor (a Russian sculptor with a sexy sister, whose work mysteriously has appeared in Rosie's apartment), a neurotic, workaholic printer on the ground floor of Rosie's building, an accordion player (who suddenly disappears after being questioned), and Rosie's estranged step-son (who needed Rosie's money for his florist business) - all fall under suspicion. The solution lies in Rosie's past hospitalization and her late husband's ""hobby"".