Harry has finally come of age, and finally started on his final journey to defeat Voldemort for good. The Durselys are forced to go into hiding so that Voldemort’s Death Eaters will not torture them for information, and Harry sets off with Ron and Hermione on a difficult quest to find and destroy the last of Voldemort’s Horcruxes. Only once those have been destroyed, Harry knows, can Voldemort truly be killed.
It’s not easy. Harry is plagued with rumors of Dumbledore’s past, and begins to wonder if the Headmaster he so long revered might have had a much darker past than he ever let on. The three are frequently without food, and with winter coming their journey is no day at the beach. Because of their lack of plan, lack of food, and lack of progress, their spirits are often low, and Ron especially becomes argumentative. One night he and Harry get into an epic fight and Ron leaves to go back home.