The commander of a B-17 Flying Fortress bomber was killed during a mission over Sicily in 1943. A young flight officer took over the B-17 and became the new flight commander. He led his brothers to charge into battle during a bombing mission assigned by his superiors. This battle made him realize that many brothers' precious lives would be sacrificed in every mission. However, the next mission was an incomparably thrilling aerial operation, which tested the tacit understanding and trust of the entire company's brothers. Mixed with ruthless sacrifices and tragic aerial battles, how could he fulfill his superiors' instructions and take into account the precious lives of his brothers.