20世纪30年代，龙蛇混杂，暗潮涌动的上海滩，各方势力缠斗角力，局势动荡不安。法租界内国民党高级爱国将领杨鼎被人杀害，一时间在社会上引起巨大震动，民间强烈呼吁追查凶手。爱国警官方召（孔祥玉 饰）受命前往现场调查，谁知期间却遭到警察局长丘尔康的百般阻挠，丘更在调查途中设下圈套加以陷害。丘妄图将责任推到中国共产党的身上，然而方召绝不肯就此罢休。经过不懈的侦查，他终于逼近了事件的真相，危机时刻更得到失散多年的妹妹方卉的救助。 　　家国大义当前，忠义赤子面临重大的挑战和选择……

Ma Lan (Qin Yi), who was born in the city, was unwilling to be a mediocre housewife and determined to take part in the surging socialist construction. Her parents did not agree with her plans, but she resolutely goes to the construction site. There others look at her strangely, but Ma Lan does not care. The master Hu Agen looks down on women, dismissing Ma Lan, who decides to learn to drive a loader. Even in secret if she must.

Ma Lan (Qin Yi), who was born in the city, was unwilling to be a mediocre housewife and determined to take part in the surging socialist construction. Her parents did not agree with her plans, but she resolutely goes to the construction site. There others look at her strangely, but Ma Lan does not care. The master Hu Agen looks down on women, dismissing Ma Lan, who decides to learn to drive a loader. Even in secret if she must.

Set in the People's Republic of China during the 1990s, the film centers on a 13-year-old substitute teacher, Wei Minzhi, in the Chinese countryside. Called in to substitute for a village teacher for one month, Wei is told not to lose any students.