This is a military love story based on a real background. He is a pilot student from an Air Force university and dreams of flying a war eagle into the blue sky; she is a beautiful EMU flight attendant who flies on the railway line every day. Their lives were originally two parallel lines that did not intersect, but an accident made them intersect. What kind of love story will the love story in blue uniforms trigger? Can the hero and heroine overcome the distance, hold hands with their son, and grow old together with him?