罔笑是个典型的乡下阿嬷, 在贫苦的环境扶养四个小孩长大, 但各自成家的小孩却不孝顺, 将她每个月轮流寄养, 兄弟间彼此计较着大小月的天数, 但乐观的罔笑总是一笑置之。 直到有一天她迷路流落警察局, 且意外地中了乐透头奖, 众子女开始急着寻找罔笑, 大家赶回乡下老家, 展开一段荒谬的比赛孝顺之旅……Bong-tshio is your ordinary countryside grandma, raising four kids in an impoverished environment; however, the kids that grew up and started their own families do not respect her, fostering her in turns for one month, while bargaining with each other about the number of days in different months. But the optimistic Bong-tshio always just laughed it off. Until one day, she got lost and wandered into a police station, and then accidentally won the top prize of the lottery. Her children began to look for her desperately, rushing back to their old place in the countryside, and kicked off a ridiculous competition of filial piety.