2008年，高中开学前的最后一个月暑假，一个13岁的台裔美国男孩学会了他的家人无法教给他的东西：如何滑冰、如何调情以及如何爱你的妈妈。

In 2008, during the last month of summer before high school begins, an impressionable 13-year-old Taiwanese American boy learns what his family can’t teach him: how to skate, how to flirt, and how to love your mom.

聚焦导演王湘圣83岁的外婆跟94岁的奶奶，性格迥异、热爱生活的两个老人一起过着普通而快乐的日子。