High school student Jiang Chen is framed by a classmate and expelled after standing up to help someone. At his lowest point, he falls asleep and wakes up in Linchuan Realm, a parallel world where human intelligence has plummeted a thousandfold. Here, two-digit addition and subtraction are considered impossibly advanced problems, while basic common sense is regarded as supreme wisdom. With his normal human thinking, Jiang Chen easily gets into a top innovation class, sweeps the provincial knowledge competitions, and challenges a century-old chess academy, winning all ten matches. As the mysterious organization Brain Core emerges from the shadows, Jiang Chen uses common sense to crush this low-intelligence world while investigating the shocking truth behind humanity's collective loss of intelligence. Thus begins the thrilling legend of an ordinary person rising to become a god.