The Riddle

There is a shadow at Hogwarts, one that is causing problems. But the Shadow has a real name. Lilith Riddle. But she's just as much of a riddle to herself as to others. But every riddle has a key: and the key to Lilith lies in the hands of two people: Lilith's sister, Cassandra, and the D.A.D.A. teacher, Harry Potter. The big problem is will Lilith survive to solve her riddle?