Zhongwen and Yixiang have settled in Japan for many years. The young couple are gradually familiar with the country’s various aspects, including work, life and culture. Moreover, Zhongwen has a good income. Although their life is not rich, they are also rich. It’s a sunny day. Zhongwen and Yixiang walk in the street hand in hand. People come and go on the street in an orderly way. It’s such a peaceful life, eh! But it was in this quiet little day that a man in a jacket looked and followed them for an hour.