June 1929.* A body is dumped into Lake Michigan; when it's fished out 3-4 weeks later, on July 10, the Bureau of Missing Persons has a John Doe on its hands. And so, Lt. Agatha Stewart and her sidekick Frank Benson are on the case. At the City Morgue, all the coroner can tell about the decomposed body is the approximate age, 50, and that the deceased might have had a bad heart.