Kaelen transmigrates and becomes the Demon Lord. Bound to a 'Death Seeker System,' he can only return to the real world to save his mother by dying. He seeks death everywhere, only to passively grow stronger. Sacred maidens and the Celestial Lord try to kill him. He establishes 'The 996 Crucible' and ventures into The Realm of Ruin to seek his end. Finally, at the Ascension Gate, he confronts its predators, finding the opportunity to die.