March 1881, London's East End. Kitty Peck, a spirited but vulnerable 17-year-old, is the reluctant heiress to Paradise, the criminal empire previously overseen by the formidable Lady Ginger. Far from the colour and camaraderie of the music hall where Kitty had been working, this newfound power brings with it isolation and uncertainty. Desperate to reconnect with Joey, her estranged brother, Kitty travels to Paris. Reunited at last, she is unable to refuse his request to take a child back to London. Within days of her return it's clear that someone has followed them...and this someone is determined to kill the child...and anyone who stands in their way.