They lost the war. Harry is a shell of his former self since Ron's execution. With Neville's help, Hermione has taken his place in attempting to destroy the last two remaining Horcruxes. When Hermione is taken hostage, Voldemort expects Harry Potter to rescue his favorite witch. He gifts her to his Officials to keep a close watch. Meanwhile, Death Eaters are being consumed by Dark Magic, dying from the affliction. Draco will do anything to protect his family. And to protect her.