Yuan Yuan (played by Yu Feihong), a well-known female designer in China, returned from studying in Japan. She has outstanding temperament and a successful career. Lei Ming, her partner for many years, also takes good care of her. However, Yuan Yuan, who seems to be a winner in life, always hides a knot in her heart that is difficult to let go. When she encountered a bottleneck in her career, the sudden appearance of a Japanese girl (played by Kinoshita Ayane) broke Yuan Yuan's originally peaceful life, and a mysterious past about Hokkaido also unfolded...