Simultaneously, an enormous spacecraft carrying gods and demons entered Earth's atmosphere, unleashing a destructive attack on the planet. This event sparked a dramatic shift in the world, as it became engulfed in the flames of war. Adorned in black armor, a team of men took on the task of thwarting the invaders' progress. These men, who had inherited advanced genetic traits from past civilizations, were born and bred on Earth to protect humanity and maintain peace worldwide.