CHEN Si-yu and his sister, CHEN Yu-fei, lost their income after their father vanished. Balancing high school with part-time work, they also endure threats and harassments from debt collectors. One day, a special task is announced for ten students, including Si-yu and Yu-fei. Summoned to the auditorium, without the teacher, confusion sets in. Attempting to leave, the siblings find the doors locked. Faint sounds fill the air, and shadows envelop the space. A bullied classmate emerges, announcing the “Graduation Challenge.” In a peculiar tone, she congratulates them on the opportunity to change their lives.
陳思宇和妹妹在父親跑路後失去經濟來源,還在念高中的兩人半工半讀,還得面對討債集團的恐嚇及騷擾。某日放學前,學校廣播通知思宇兄妹等十位同學到禮堂集合,抵達後卻沒有師長來傳達事項,門也被鎖上,瞬間暗黑無光。此時,被長期霸凌的女同學出現在講台上,她以奇異的姿態告知眾人獲選參加「畢業挑戰」,獲得改變失敗人生的機會!