It is the summer of 1891 and London is simmering under an oppressive heatwave. The air is thick with tension and sexual repression. But another wave is about to rock the capital - one of morality - as Oliver Wheeler and the puritans of his London Vigilance Committee seek out perversion and aberrant behaviour in all its forms. Charles Webster, an impoverished photographer working for famed actor-manager Henry Irving at the Lyceum Theatre, has been sucked into a shadowy demi-monde which exists beneath the surface of civilized society. It is a world of pornographers and prostitutes, corralled under the sinister leadership of master photographer and manipulator Marlow, to whom Webster illicitly provides theatrical costumes for pornographic shoots. But knowledge of this enterprise has somehow reached the Lyceum's upright theatre manager, Bram Stoker, who suspects Webster's involvement.