The year is 1831

Down the murky alleyways of London, acts of unspeakable wickedness are taking place and no one is willing to speak out on behalf of the city's vulnerable poor as they disappear from the streets.

Out of these shadows comes Hester White, a bright young woman who is desperate to escape the slums by any means possible.

When Hester is thrust into the world of the aristocratic Brock family, she leaps at the chance to improve her station in life under the tutelage of the fiercely intelligent and mysterious Rebekah Brock. But whispers from her past slowly begin to poison her new life and both she and Rebekah are lured into the most sinister of investigations.

Hester and Rebekah find themselves crossing every boundary they've ever known in pursuit of truth, redemption and passion. But their trust in each other will be tested as a web of deceit begins to unspool, dragging them into the blackest heart of a city where something more depraved than either of them could ever imagine is lurking . . .