Chun Hua, who has been away from home for years after cutting her father off, receives the news of her grandfather's death and has no choice but to return home with her daughter for the funeral. Her father, whom she hasn't seen in years, is as cold and rude as ever, and doesn't look kindly on them. And when night falls, the family seems to be hiding more horrible secrets.

Xiang Wei-xin, a 17-year-old high school sophomore, regards eating as the most important and most healing thing in life. The first time she met her senior Tao You-quan was in the school's welfare agency. At that time, Xiang Wei-xin lost 5 yuan and could not buy her favorite pineapple bread. Tao You-quan made up the money for her, which made her feel deeply indebted to her.

Chi earned her American dream after persevering with her studies in Taiwan. Following her grandmothers’ death, Chi returns to her family on Happiness Road, where she begins to feel nostalgic about her childhood and starts to contemplate the meaning of “life” and “home”. What is happiness? Will Chi find her own happiness?