Rabbit and co are tasked with solving the murder of another young woman. It doesn't seem that unusual. That is, until they notice a second bullet hole and a mysterious symbol on her make-up compact.
Rabbit, Strauss and Mabel are on the case of a mysterious killer who takes the guise of the Brick Man, a mythical figure from London folklore. And Lydia emerges from the shadows with designs on Mabel.
Gang warfare is raging in the East End. Wisbech sends Strauss and Mabel undercover, whilst Rabbit finds himself ostracised from the case due to his age.