Set in a steampunk alternate reality, a brilliant but reclusive inventor becomes embroiled in scandal when falsely accused of sabotaging the city's grand technological showcase. Forced into hiding, she receives anonymous notes threatening to divulge her most intimate love affair with a high-ranking official unless she complies with the blackmailer’s demands. Through a maze of steam-powered machinations and shadowy societies, she races to unmask her blackmailer and save her clandestine relationship from ruin.