After a devastating battle with the ruthless Hellfire nearly ends in catastrophe, Atlas is left questioning whether the world would be safer without him in costume. Wracked with self-doubt and guilt, he prepares to walk away from the life of a hero forever. Refusing to let one of their own fall, the 10th Muse gathers Earth's greatest champions for an intervention unlike any other. But as Hellfire's demonic legions launch a full-scale invasion of Earth, Atlas must decide if true heroism means never failing-or finding the strength to rise again when everything is on the line.