A low-level programmer at the "God's Domain" holographic game company has been squeezed, insulted, and withheld bonuses by his boss Zhang Jingyuan for a long time. While working overtime late at night, he accidentally activated the "GM test channel" hidden in the background of the game through the backdoor cracked by his wife Su Tangyin, and became the new GM with control over the world's underlying data - at the cost of consuming real lifespan every time he manipulates data, leaving only 179 days left.
He discovered that Zhang Jingyuan's real purpose in developing "God's Domain" was not to make a game, but to use the "Reality Mapping Protocol" to cover the game rules in the real world and convert human consciousness data into controllable NPCs. Zhang Jingyuan also imprisoned Su Tangyin's consciousness in the boss room of the main city as an anchor point, threatening Li Yanshu to hand over his authority.
Li Yanshu relied on his GM authority - data eye, item modification, character deletion, time retrieval and other abilities - to start a duel with Zhang Jingyuan. With the help of his friend Zhao Xiao who volunteered to become the "Sword of Sin" and the future timeline, he finally sealed Zhang Jingyuan with the "God Conferring Agreement" at the cost of transforming himself into an "observer" and becoming the last network cable to maintain the balance between reality and the game.