After the class reshuffle in his second year of high school, Chen Mian took the second-to-last seat in the row by the window, also known as "the protagonist's seat." He discovered that whenever he fell asleep at his desk, he would dream. In his dreams, he became the hero of an adventure story, setting off on a journey with the summit of a mountain as his goal. In this adventure, with him as the protagonist, familiar teachers, classmates, and friends would join in from time to time. He also met two reliable companions, and the three of them set off together toward the summit.
