In the brutal urban jungle of an alternative Paris in 1828, the French Revolution was defeated. The city is divided between a ruthless royal family and nine criminal guilds. Nina Thenardier is a talented thief and member of the Thieves Guild. Her life is one of midnight robberies, escaping her father's fists, and looking after her adopted sister Etty. When Etty attracts the attention of Tiger, the ruthless baron of the Flesh Guild, Nina finds herself embroiled in a desperate race to protect the girl. The oath takes Nina from the dark underground of the city to the glittering court of Louis XVII. And this forces her to make a terrible choice: protect Etty and start a brutal war between the guilds, or lose her sister forever to the Tiger...