This film takes Nagasaki as the background for this film. Through the eyes of four children, Ma Ma was invited by his brother who had lived in the United States for 70 years to go to Hawaii to realize his dream of brother-sister reunion. However, Ma's late husband was killed by an atomic bomb many years ago, and he delayed agreeing to get together. Through the visit of his nephew of American and Japanese descent, a hatred that had been entangled for more than 40 years was finally resolved. The whole film is fresh and pleasant, with tears in the smile.