台北小孩豆豆（庄博文 配音）因为爸爸出车祸，妈妈要处理后世因此不得不先搬去台南和外表可怕的阿妈（文英 配音）同住。但是不久豆豆就惊奇地发现阿妈其实是拥有制服妖怪法力的驱魔师，鬼怪都很怕她。有一天，由于豆豆的贪玩，一个鬼怪（许杰辉 配音）被放了出来，鬼怪为了对付阿妈，利用豆豆做出了一些伤害阿妈的事情以增强自身的魔力。而在朝夕相处下，豆豆对阿妈的感情也起了变化，阿妈会不会被击败，就在最后关头了，豆豆能否成功帮助阿妈战胜魔鬼就看最后时刻了。A 5 year old kid moves to live with his grandma in a small town at Taiwan. Soon after, he discovers that her grandma is not only a vendor, but also she is good at catching spectres. One day...