After the first train robbery in American history, Allan Pinkerton partners his wayward son Will with the world's first female detective, Kate Warne. Before they can solve the case, Will and Kate must first learn how to work together.
When a whiskey magnate is found dead in a brothel, the Pinkertons go head-to-head with Sheriff Logan and learn that the truth is murkier than a barrel of Kentucky bourbon.
Will and Kate get more drama than they bargained for when an actor dies during a performance of "Hamlet" and Will is forced to go undercover as a member of a traveling theater troupe.
When a young, idealistic Civil War hero is attacked during a campaign speech, the Pinkertons are pulled into an even dirtier world than they're used to - politics.
Will and Kate uncover a mystery that hits too close to home when a fellow Pinkerton Agent is murdered, and Allan returns to Kansas City to oversee the investigation.