The mighty Doom Slayer had finally beaten his greatest enemy Davoth, the creator of all things. He had eliminated all demons from the world of the living. He had stopped the demonic invasions once and for all. But after his victory, something happens. He finds himself trapped in a brand new hell that is nothing like his own.
Extermination day was a day that happened once a year in Lucifer Magne's circle of hell. It was a time that all hellspawn and sinners feared for their lives. They dreaded the day when it came once again. But when a new man appears, they may not fear it anymore.