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，性情悬殊、酷好生存的两个白叟一起过着通俗而康乐的日子。

一位爱国志士冒死刺杀日军垂问人员，将夺来的日军有关上水兵事动作的机密情报躲身于“百年太岁”中，由章家父女将“百年太岁”奥秘送往上海。到了上海，章家父女却离奇死亡，戏班学徒秦太岁偶尔间被卷进这桩凶杀案中，“百年太岁”落进上海黑帮人物卓亦凡手中被高价拍卖。同时，欲洗清冤屈的秦太岁开端查询拜访事情实情，与爱国抗日奥秘构造联手…