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.

Feng runs away from her rural home to pursue singing in Taipei but is trafficked to Japan as a prostitute. Years later, she returns to Taiwan, burdened by guilt and avoiding her family while secretly sending money home. Her brother Ming, now a police officer, searches for her, unaware of the life she now leads. Their paths cross under difficult circumstances, forcing both siblings to confront their past and present.

Mabel, Liam and Aaron have been friends since childhood. Their bonds of friendship are tested when, years later, they realize their friendship is the only reason they have made it through emotional hardships and extreme tragedies.