Victorian London, the world's first metropolis, offered brand new opportunities: you could hide in plain sight or reinvent yourself. Murder is for hire in a street inhabited by the 'semi-literate & criminal', a place regarded as the worst in London. Mary and Liza are best friends who live on the street; one on her way up, the other down. When one of them is marked as a candidate for the assassin's ring, their friendship is shaken. As they drift further apart, suspicion sets in. Will the two be able to stay friends - or fall out in an aftermath of bloodshed?