The movie tells the story of the Yen Phu power plant workers, who stayed back in Hanoi to protect the power plant during the time the American were bombing the North. Trong, a pwer plant worker was sent to the evacuation point after his application to the suicide squad was rejected. There, he managed to perfect his innovation plan to help the power plan and got sent back to the factory. During a bombardment, his father was injured and with the help of other workers, he saved his father and continued his job in the plant.