An unknown disease is striking to younger generation, the patients are going to lose the sense of reality and the memory of themself. We following a girl who got her new name 'OK' and she is going to figure out what's going on.

By Heart follows Catherine as she tries to figure out a way to hold on to her American roots and identity, after being brought to Taiwan due to her parents' separation, by resisting an indoctrinating Confucian text she has to memorize at school.

Everything around Mrs. Yan looks perfect, but her mind is as confused and complex as the variety of medications she is taking. To reach peace of body and mind, she tries many methods including qi training, but to no avail. One day she gets a message that the woman who had an affair with her husband is in a nursing home and suffering from dementia.

My sister and I went to Grandma's house for a funeral when I was 10. That was a special winter for me. Those days will last as long as our own memories.