總是被困在教室裡的國中女孩霈霈，與常常不見人影的男孩陳以翔，雖然在同一間教室上課，卻是兩個世界的人。一次，在比賽落敗而自責萬分的霈霈，卻因為以翔的安慰，得以爬出學校圍牆，享受另一個從未體驗過的世界。青春壓抑與焦慮的霈霈，內心不被允許說出的聲音噪動不安，找不到發泄的出口；牆外的世界真有如想像中的美好？陷入迷惘的霈霈，翻過牆可以找得到路嗎？Pei-pei is a junior high girl, who is often trapped in the classroom with Yi-shian, a boy hardly seen. Though they are in the same classroom, they are in two different worlds.One day, a failure in competition makes Pei-pei feeling awful. Through Yi-shain’s encouragement, she climes over school’s fence to explore a new world.Pei-pei had a hard time to keep calm because of constant depression and anxiety in her puberty. There is no exit to vent her forbidden desire and voices that should not be heard. Is the outside world really as wonderful as she imagined? Will Pei-pei be able to find the way after crossing the wall?