Based on "Till We Reach That Day" on fanfiction.net.  Harry Potter, age almost eleven, knows well the stories of the four Marauders.  Prongs and Moony died in the first war, along with Moony's wife Danger, her parents, and her baby sister. Wormtail and Padfoot live in hiding, Wormtail somewhere unknown, Padfoot with his wife and daughter at number seventeen, Privet Drive. Harry also knows that you can never trust a Malfoy. But when Harry meets a boy with blond hair and his pet wolf in Madam Malkin's, some of the things he knows begin to change...