Victorian London is gripped with fear as a serial killer leaves cryptic messages written in the blood of his victims. Scotland Yard's Inspector Kildare must rely on help from a witness to stop the murders and bring the maniac to justice.

In the late 19th and early 20th century, the foot soldiers of the early feminist movement were forced underground to pursue a dangerous game of cat-and-mouse with an increasingly brutal state in the quest for equal rights.