A Study in Friendship (смешанная)

Sherlock knows that the Potter boy, the one with the abusive relatives, is hiding a secret, and sets out to solve the mystery. In the meantime, Harry sends a letter to Lord Voldemort in an attempt to come to an agreement with his enemy, and finds out that he and Tom Riddle aren't so different after all. The story of three lonely boys finding friendship in each other. Eventual Slash.