In the aftermath of a turning point, Harry is forced to face what he has always wanted most: a real family, and the father he never expected to find. But there’s no time to breathe. Dementors circle, Death Eaters close in, and the Marauder’s Map paints a brutal truth across Hogwarts’ grounds. When Minerva McGonagall confronts Snape and old loyalties collide with new truths, the castle’s defenders have to decide what “saving people” really costs tonight.