Ruby (Jamie Chung) is a toy designer working in Hong Kong. One day, she met a man named Josh (Bryan Greenberg). Josh is a financial worker, but he has a dream of writing. Under Josh's leadership, Ruby, who has just arrived, appreciates the unique beauty and style of Hong Kong. In the process, the distance between the two hearts is getting closer and closer. However, an accidental occurrence makes this relationship finally end without a trace. After a round of spring, summer, autumn and winter, Ruby and Josh reunited. At this time, Ruby has settled in Hong Kong, and Josh also resigned and embarked on a new journey of life. Under the romantic night, Ruby and Josh both relived the throbbing in their hearts, but at this time, both of them have lovers who are dating. Driven by reason and emotion, what choices will they make?