London, 1882: In this her final case, Frances Doughty goes undercover for Her Majesty's Government to investigate some disturbing information regarding the apparently innocuous Bayswater Bicycle Club. Before long she is plunged into a murky world of deadly secrets, a suspicious disappearance, and a brutal murder, and the Lady Detective is forced to do the unthinkable to prevent becoming the next victim. With a new and exciting future lying before her, is there anything the dauntless Miss Doughty cannot do?