London 1882: In this, her most demanding 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 avoid becoming the next victim.

With a new and exciting future before her, is there anything the dauntless Miss Doughty cannot do?