期末考即將來臨，代課老師立宏殷殷等待，續聘的聘書尚未到來……
在這七天之中，事情接踵而來：弟弟立東竟然涉入一起重傷害刑事案，艾晴老師有意無意向立宏暗示，想要將兩人的情感關係往前推進一步。學生小盛被控蓄意傷人，一心希望老師挺身而出為自己說句公道話。因為少子化帶來縮編減班的壓力，學校招生任務益增繁多，立宏為求表現，主動承擔。
弟弟的拖累，女友的企盼，學生的期待，招生的重擔…在這焦頭爛額的七天當中，立宏要做出他人生的重大抉擇。為了要贏得這個續聘的聘書，立宏會付出什麼樣的代價？弟弟的親情，女友的愛情，學生的信任，還是立宏自己的尊嚴？這是學生的期末考，也是立宏的人生大考。
It is seven days before summer vacation and the finals are approaching. Li-Hong, a substitute teacher, is waiting for his long-overdue contract renewal, which is needed by him desperately to pay for his grandmother’s medical bills and the key to a brighter future. Meanwhile, a declining birthrate in the
village has led to closure of schools and threatens Li-Hong’s work. As he waits anxiously, he is confronted by a series of events that tests his resolve and character.
His estranged brother, Li-Dong, is facing a felony assault charge.His rival for the contract, Ai-Qing, has dropped hints that she would like to take their relationship to a deeper level. His favorite student, Xiao-Sheng, accused of attacking other students, is hoping that Li-Hong would come to his defense.
And to make an impression on the principal, Li-Hong takes on more tasks and responsibilities in school.
Faced with his brother’s troubles, Ai-Qing’s expectations and Xiao-Sheng’s hopes, what will Li-Hong sacrifice to win that contract – family, love, trust,or his dignity? Save his brother or save his own skin? Tell Ai-Qing how he feels or turn her down? Stand upfor Xiao-Sheng or dash his hopes? Seven days, what will Li-Hong do? It is the students’ final exams, but it is also Li-Hong’s biggest test in life.