A scientist buried in his work to avoid the pain of his wife's death, he brings a robot home which looks just like his wife. The robot carries the burden of making her two daughters "happy". Tzu-Yu, a scientific girl who inherited her father's talent. She has not only to face the huge changes caused by her robot mother, but also the pressure of the competition. Moreover, the romance between her and the gifted transfer student Yi-Hsiu, making her sip the sweet and sour taste of growing up.

Set in 1977 Zhongli, Taiwan, amidst election turmoil, photographer Hsien-ying forms deep connections with Korean Taekwondo coach Chin Hao-hsi and childhood friend Hung-kuo. Encouraged to chase her dreams, Hsien-ying faces hesitation and tragedy as political chaos and personal loss reshape her life and perspective.