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...
During the War of Resistance Against Japan, a CCP army unit guarding the southwest border follows what is ostensibly a trading caravan and discovers that these traders are actually smuggling arms and spy equipment to Chiang Kai-shek and his American allies.
