Tamsin Lark didn't ask to be a Hollower. As a mortal with no magical talent, she was never meant to break into ancient crypts, or compete with sorceresses and Cunningfolk for the treasures inside. But after her thieving foster father disappeared without so much as a goodbye, it was the only way to keep herself--and her brother, Cabell--alive. Ten years later, rumors are swirling that her guardian vanished with a powerful ring from Arthurian legend. As word spreads, greedy Hollowers start circling, and many would kill to have it for themselves.