Lin Yuan, an ordinary young man on earth, died unexpectedly and his soul was split into two, traveling to the mysterious endless abyss and the human world respectively. Falling into the abyss, he transformed into a weak demon, but gained a mysterious system panel. He could acquire skills by killing enemies, and he could also decompose corpses to gain genetically enhanced subordinates. He continued to evolve amidst the dangers, and eventually became a demon king, building a formidable demon city.
Another person in the human world changed his profession to become a summoner. He was misunderstood because of his special abilities and was regarded as an agent of the Abyss by the Church of the Abyss, so he had no choice but to join it. As everyone knows, the situation in the human world has already been undercurrent. The clone of the God of Light was polluted by the power of faith and attempted to rule the world, suppressing the churches of the gods until they were almost destroyed; the Church of the Light became its minions, killing all dissenters; the Church of the Abyss was bewitched by the power of the abyss, becoming half human and half demon, and sacrificed for power in an attempt to subvert the order of the human world.
Although Abyss Lin Yuan and Human Realm Lin Yuan are in different situations, they cooperate with each other due to a special connection. On the one hand, they have to deal with the encirclement and suppression of the Church of Light, and on the other hand, they have to beware of the conspiracy of the Church of the Abyss. They also have to explore ways to purify the power of faith, restore the connection between the human world and the divine world, and defeat the clone of the God of Light.
In the process, they got acquainted with Lolo, a mysterious spirit with healing powers, and united with the oppressed churches of gods, magicians, knights and other forces. After a fierce battle with the Church of the Abyss, they turned the tide in the final battle.
