Looking for a Reid and Hotch fanfic

Looking for a fanfic which both reid and hotch are kidnapped by an unsub. Reid gets most of the torture and the unsub becomes fascinated by reid. They make a deal that reid will stay with the unsub insted of the unsub harming hotch's brother. I remember the unsub at one point uses a paralytic on reid, and 'operates'on him. Thats about as much as i can remember!

Thanks :)