Rhea Vance should've died - but mercy can be its own kind of curse. Saved by the Alpha Pack and bound by blood debt, she understands that every act of kindness comes with a price. When she's sent to Beacon Hills to manipulate Derek Hale, she expects another transaction. What she doesn't expect is him. Because Derek doesn't want anything from her. And for someone who's only ever survived through what she owes, that's the most dangerous thing of all.