Hogwarts chooses its side, even when it hurts. McGonagall follows, Flitwick and Sprout gamble on Harry’s word, and the castle fills with students who refuse to run. Old grudges, old loyalties, and old lies collide in the middle of a living battlefield.
As the fighting spreads, friends become soldiers. Pettigrew makes his move and pays for it. Bellatrix turns her cruelty on Luna, and Neville answers with a rage that finally has somewhere to go. Meanwhile, Harry tries to hold the line between saving everyone and winning the war, while Voldemort closes in, claiming the right to end the story himself.