She's a human thief in a world that despises her kind. He's the silver-tongued Fae crime lord she's sworn to rob. To save her dying sister, Seraphine must steal the Jewel of Avarith, a fist-sized sapphire pulsing with forbidden magic. The heist is her only hope, a desperate, jaw-dropping plunge into the depths of the fae underworld. But she is not prepared for its master, the breathtaking and brutal Valthorne.

Caught in his trap, Seraphine's defiance only fuels his dark desire. Now, she is his prize, his pet, bound by a collar of writhing enchantments that transforms her rebellion into waves of sinful pleasure. In his opulent cage of obsidian and starlight, every heartbeat is a battle between her will and his. He is a monster, a creature of midnight and menace, yet his touch is a tantalizing fire she finds herself craving.

This is no simple game of cat and mouse. It's a provocative dance of submission and power, of pain and passion. To win her freedom and save the one person she loves, Seraphine must not only survive Valthorne's sensual torments but also uncover the secrets of his own tormented soul. But in a world of shadows and magic, the line between hate and lust is a savage, thin thread. And when it snaps, she may find that the cage she's fighting so hard to escape is the only place she's ever truly felt alive.