"Los Angeles, 1921: Ex-Pinkerton Charlie Siringo is living in quiet retirement when Wyatt Earp knocks on his door and asks him to track down his missing horse. What begins as horse thievery turns into a deeper mystery as Siringo and another ex-Pinkerton, the young Dashiell Hammett, follow clues that take them from the streets of Los Angeles to Jack London's farm, until they discover a conspiracy masterminded by the notorious and powerful Joseph P. Kennedy"--Provided by publisher.