Deals in the Dark (слэш)

Harry knew he didn't stand a chance against Tom Riddle and the Basilisk in the Chamber of Secrets in second year. So Harry manages to make a deal with the memory: Ginny's life in exchange for a favor down the road. Harry never told anyone about the deal, but the memory of that night haunts his dreams.
Years later, just as Harry is preparing to go after the locket with Dumbleldore in sixth year, Riddle decides he wants to call in that favor.
But knowing Harry Potter, things don't go as planned.