"Upgrader of All Realms: From Good-for-nothing to Omniscient and All-Powerful" tells the story of Lin Chen, a young man from Qingyun City who was regarded as a good-for-nothing because he had no spiritual roots. After the death of his parents, he and his sister Lin Xue depended on each other. In order to save his sister who was suffering from cold poison, he suffered humiliation from the young master of the Zhao family, Zhao Wuji, but in a desperate situation, he accidentally awakened the all-things upgrade system.
With the help of the system, Lin Chen can upgrade himself, skills, items and even life forms. From incomplete basic skills to high-level martial arts, from ordinary herbs to rare spiritual materials, from his dying sister to his own useless physique, everything can be upgraded. He fought back all the way from a humble loser, repaired his sister's stubborn illness, slapped his enemies in the face, and swept the crowd as a dark horse in the youth competition. He walked out of Qingyun City and entered the broader Tianfeng County.
Faced with family grudges, power disputes, dangerous secret realms, and powerful enemies, Lin Chen relies on the system to continuously break through the realm, hone his strength, recruit loyal servants, make close friends, and meet beauties, and gradually uncover the secrets of his own bloodline and system. Eventually, he traverses the world, and counterattacks from the bottom to become the all-knowing and all-powerful supreme king of all worlds.