Lin Fan, a disciple of Qingxuan Mountain, has activated the "Ten Thousand Years Sign-in" system since he started. However, due to system rules, he needs to sign in at the mountain gate for 100,000 years before he can unlock his full strength. For this reason, he kept his name anonymous and worked as a handyman disciple that no one cared about for a hundred thousand years. He watched his nephews grow up to be the pillars of the sect, and watched his former classmates become giants in the immortal world, but he was always a "waste" in the Qi refining period.
At the expiration of one hundred thousand years, the system is complete, and the accumulated power in Lin Fan's body is enough to shake the Three Realms. But before he could leave calmly, the empress of Qingxuan Mountain personally drove him down the mountain on the grounds that "the mountain gate's resources have been exhausted and useless handymen have been eliminated."
Lin Fan, who was forced to leave the mountain gate, originally wanted to travel the three realms in a low-key manner, but found that a hundred thousand years have passed and the world has changed: the little fox he casually rescued in the past became the emperor of the demon clan, the boy he once taught became the supreme demon, and even the mortal who gave him a roasted sweet potato back then became the founding emperor of the human dynasty.
What he didn't expect even more was that behind the empress forcing him to go down the mountain, there lay the secret of the survival of the Three Realms - the ancient demon god was about to break through the seal, and only he, an "old monster signed for a hundred thousand years", could stop this catastrophe. From then on, Lin Fan was forced to switch from the "low-key pension" mode to the "sweeping through the three realms" mode. While being chased by various "old acquaintances" to repay his kindness, he was "routinely tricked" by the empress to carry the banner of salvation. At the same time, he had to deal with those clowns who coveted his strength, and staged a hilarious and exciting drama of "I just want to fish, but I am forced to become the savior of the three realms."
