Artemis Williams knows she's different, even for a witch. Growing up in a family that was never really hers, she's surrounded by people who will never understand her. But when Sirius Black escapes from the wizarding prison Azkaban, she finds a strange new bond with a friend she never really wanted and it sets off a chain of events that changes her life forever.

Since Molly took care of Harry for seven years, Lily will repay her by taking care of Fred.