As the investigation into Linklater's death continues, Reid and the team deal with the murder of a woman whose recently delivered baby has been stolen, which leads them to a former foe.

A prominent male member of the London City Council is kidnapped. His abduction seems to be connected to the potential election of a woman to the Council, but matters are complicated when various other prominent men disappear.

A dangerous terrorist, purportedly a member of the Irish Republican Brotherhood, escapes from police custody and attacks an MP. In order to apprehend him, Reid sends Flight on an undercover mission to befriend the man's daughter.

The murder of a telegraph boy uncovers a secret network of homosexual prostitution within the post office. Two of the young men are found to have been blackmailing a client, which could lead to potential scandal.

Reid must act quickly to prevent a religious war in Whitechapel when a series of arson attacks on churches and synagogues occurs in the district, all of which seems to be linked to Drake's wife, Bella, and a figure from her past.

Rose's search for Drake leads her to a frightening place, Jackson receives an unexpected visit from his wayward brother, Long Susan is under pressure from Duggan, while Detective Inspector Shine exerts his influence over Flight.

Reid faces scandal due to Best's deviousness, Drake readjusts to life back home, Rose faces the prospect of a new future, while a grim discovery in a Whitechapel slum may lead to the downfall of many.