Buntaro Mori is a loner, but being alone in a crowd is almost as bad as being forced to fit in. Then, in high school, a dangerous bid for solitude introduces Mori to the rush of solo climbing, addicting him to the brilliant sense of freedom he finds as he pits his body and soul against the heights. But how high does he have to climb to leave humanity behind?

Transfer student Buntaro Mori starts his first day at his new school already on the administration's radar. He's withdrawn and sullen, and the teachers are just waiting for him to explode. When his annoying classmate Miyamoto promises to leave him alone forever if he climbs to the top of the school, Mori eagerly takes up the challenge and shocks everyone when he makes it all the way to the roof. Flush with the victory of his first successful climb, Mori can't resist the lure of the local peak, even though more experienced climbers warn him of the risks of climbing alone. But Mori doesn't care. A little danger is nothing in the face of his new obsession!