A famous magician does the ultimate disappearing act and vanishes into thin air. All of London is talking about the mystery and Eliza is hired by a newspaper to investigate, despite the fact that Duke is already on the case.

Eliza bumps into Arabella Herbert, the girl who made her life a misery growing up. But Arabella seems kind and considerate, everybody loves her. So when Eliza suspects she may be a criminal, no one wants to hear it, least of all Duke.

Eliza is on the trail of a notorious conman and tracks him down to a hotel in a remote part of France. She believes she has finally caught Scotland Yard's most wanted man, but she's not the only hotel guest who wants to claim the reward.

Detective Fitzroy sees one of his colleagues plant evidence on a suspect. With Duke away, Fitzroy turns to Eliza and hires her to look into a case of police corruption.

Eliza is on the verge of earning life-changing money finding the heir to an unclaimed fortune. It's a race to claim the money and Eliza will need Duke's help, but a revelation about his personal life makes working together impossible.

The season comes to an explosive climax when Eliza receives a bomb in the morning post. Who sent it and why? Eliza teams up with Duke, Moses and her old enemy Patrick Nash to find out who is behind the deadly delivery