Captain Jim Agnihotri and his wife, Lady Diana Framji, are embarking to England in the summer of 1894. Jim is hopeful the cruise will help Diana open up to him. Something is troubling her, and Jim is concerned. On their first evening, Jim meets an intriguing Spaniard, a fellow soldier with whom he finds an instant kinship. But within 24 hours, Don Juan Nepomuceno is murdered, his body discovered shortly after he asks rather urgently to see Jim. When the captain discovers that Jim is an investigator, he pleads with Jim to find the killer before they dock in Liverpool in six days, or there could be international consequences. Aboard the beleaguered luxury liner are a thousand suspects but no witnesses to the locked-cabin crime.

1893: Newlyweds Captain Jim Agnihotri and Diana Framji are settling into their new home in Boston, Massachusetts, having fled the strict social rules of British Bombay. Jim, now a detective at the Dupree Agency, is teaching Diana the art of deduction he’s learned from his idol, Sherlock Holmes. Everyone is talking about the preparations for the World's Fair in Chicago. Captain Jim will experience it first-hand: he's being sent to Chicago to investigate the murder of a man named Thomas Grewe. As Jim probes the underbelly of Chicago’s docks, warehouses and taverns, he discovers deep social unrest and some deadly ambitions. When Jim goes missing, young Diana must venture to Chicago's treacherous streets to learn what happened.

In 1892, Bombay is the center of British India. Nearby, Captain Jim Agnihotri lies in Poona military hospital recovering from a skirmish on the wild northern frontier, with little to do but re-read the tales of his idol, Sherlock Holmes, and browse the daily papers. The case that catches Captain Jim's attention is being called the crime of the century: Two women fell from the busy university’s clock tower in broad daylight. Moved by Adi, the widower of one of the victims --- and his certainty that his wife and sister did not commit suicide --- Captain Jim approaches the Parsee family and is hired to investigate what happened that terrible afternoon. But in a land of divided loyalties, asking questions is dangerous.