It was said that she had the good manners of a respectable upper servant but was far too young to have been pensioned; that she spoke as if she had received an education, but knew the coasters' slang as if she were born-and-bred to it; and that she not only had no husband - which was a commonplace on Leather Lane - but seemed never to have possessed one.

When the mysterious Sarah Tanner opens her Dining and Coffee Rooms upon the corner of Leather Lane and Liquor pond Street, her arrival amongst the poor market-traders is a nine-days' wonder. Few doubt that she has a 'past'; but no-one can possibly predict how it will return to haunt her. When an old friend is brutally murdered by the unlikeliest of assailants, Sarah Tanner is the only witness. Unable to turn to the police, she reluctantly finds herself drawn back into the dark underworld of the Victorian metropolis. Assisted by unlikely friends, dogged by the criminal machinations of 'the greatest gamester, felon, villain, swindler, and scoundrel in London', she must unravel a web of treachery and deceit, that takes her from the gaming hells of Regent Street to the suburban heights of Upper Holloway; from the slums of St.Giles to the fast-flowing waters of the Thames. Relying on her wits, trading on her past, Sarah Tanner risks gambling her own life upon a desperate quest for justice and vengeance. Lee Jackson returns with a new "Lady detective," the first of a gripping series set in 1850s London.