The film follows the life of Nguyễn Văn Trỗi from shortly before he was caught for his attempted assassination of McNamara to his eventual execution, leaving behind his newlywed and others around the couple.

Silent Soldiers tells the stories of soldiers on the battlefield. The film is set amongst the opening of the campaign against Buon Ma Thuot. The troops hid in the rubber forest waiting for orders. Old Lung and his daughter Ho May are the silent soldiers operating in the enemy's heart, as scouts for the army. News of Gia Lung's father and son helped the army capture Buon Ma Thuot.

Taking orders from the People’s Revolutionary Tribunal, a group of special task agents from Saigon’s underground resistance force carry out clandestine campaigns against the enemy’s side.

As the new government takes over South Vietnam following the Fall of Saigon, civil engineer Dương Tấn is fearful of imminent repression. He and his colleagues are dispatched to fix a hydroelectric plant where they meet Đỗ Long, a bubbly engineer from the North.

Upon meeting a young Vietnamese soldier during his brief stay in the Lao mountains, a woman begins recalling to her daughter episodes of her life ever since she had to leave Northwest Vietnam in 1952, including her fateful encounter with a Lao mother.

An elderly couple from Vinh and their grandchild takes a coach to Viet Tri The passengers face numerous harassments during the journey, but luckily a youth volunteer and a discharged soldier are determined to help them.