The walls have fallen. The defenders’ unity is broken. The Inner Palace lies in ruins. The Warmaster’s horde advances, forcing the loyalists back to the Delphic Battlement, the very walls of the Sanctum Imperialis. Angron has achieved immortality through annihilation – he leads the armies of the damned in a wrathful tide. The Khan lies on the edge of death. Rogal Dorn is encircled, fighting his own war at Bhab Bastion. Without his brothers, Sanguinius – the Angel of the Ninth Legion – waits on the final battlements, hoping to rally a desperate band of defenders for one last stand.