Valen Blackthorn, once a minor antagonist in the grand schemes of heroes and protagonists, crosses a line when he takes a heroine, Seraphine, by force, manipulating her into submitting to him by holding her family’s survival as collateral. This enrages her destined lover, Cedric, one of the chosen protagonists, who eventually tracks Valen down and beats him to the brink of death.
But in his final moments, something incredible happens. A migrant from Earth—a ruthless and cunning man—has his soul transmitted into Valen's dying body. Revived with newfound strength and intellect, Valen is now equipped with the Ultimate Villain System, a system that rewards him for stealing the luck, fate, and people meant for the protagonists.
With the Ultimate Villain System at his side, Valen begins a new journey, trampling the protagonists of the world, taking their women, families, and opportunities for himself, and gaining Fate Points that allow him to grow stronger and acquire unimaginable powers. He expands his influence, builds an enormous harem, conquers powerful factions, and eventually rules the entire world.
