At the end of the Spring and Autumn Period, Ji Ren, a disciple of the military sage Sun Wu, failed to assassinate Dugu Chou, an official of the Zhao State, and was pursued by the "Shadow" organization, and was forced to jump off a cliff. As a result, he jumped to modern times and became a student. He thought he could live a stable and ordinary life. Unexpectedly, the bone painting and space-time protective shield he carried were targeted by a mysterious organization and attempted to use them to destroy the world. Ji Ren had no choice but to pick up the weapon again, and with a group of brothers, he blew the clarion call to attack the influence organization.