James and Lily had been forced to go into hiding after being accused of being Death Eaters and killing Sirius Black. Naturally, they took their son with them. But what most people didn't know was that they also had a daughter. Mia Potter. Or known by everyone else, Mia Weasley. What Harry doesn't know is that his life is about to get better. It all started with a knock on the door from Albus Dumbledore.