During the War of Resistance, underground party member Li Sanqiang becomes the county magistrate of Wuze to complete a secret mission. He must outsmart both the Japanese forces and Chinese traitors in a high-stakes battle of wits.

A group of Chinese scientists return from overseas to contribute to their country’s future. Led by physicist Wang Huaimin, they join China’s first nuclear research institute and overcome immense challenges to develop the nation’s first atomic and hydrogen bombs.