When you were in your third year at Hogwarts, you made a deal with Mattheo Riddle. Mattheo asked that you get him away from his father, and to the safety of a new home. You helped him and brought him to a safe house where The Dark Lord and his followers couldnt even look at it without being attacked. Mattheo offered you a life debt in return. Now, you are in your seventh year. The Dark Lord found out you were helping Mattheo and starts hunting you down. Mattheo helps you and you fall in love.