Harry Potter, after a beating by Dudley and friends — with the help of a real gang member — wishes he had somewhere safe to go, and starts crawling home. He ends up in Equestria. The CMC find him. A year later, an owl brings his Hogwarts’ letter!
Book Two of the Lonelyverse. Having gotten through Harry's first year with a lot of excitement, him and the alicorns thought they could unwind. Sadly, it was not to be. House elves, giant snakes, hidden chambers... Looks like another eventful year!