暑假到来,自幼丧父的小学三年级学生正男(关口雄介饰),如今和奶奶生活在一起,暑假特别无聊。他拿出母亲从外地寄回的信,准备自己一个人去爱知县丰桥市看望母亲。 邻居阿姨(岸本加世子饰)发现后,决定帮正男完成心愿。她拿出一笔钱做为旅费,还安排游手好闲的老公菊次郎(北野武饰)陪伴正男一起踏上寻母之途。可是在第一天,菊次郎就把老婆给的钱全部输光,于是两个人只好步行前往爱知。 一路搭顺风车,惹了不少麻烦后,菊次郎终于带着正男到了他母亲的家,但小男孩却十分沮丧。归途中,菊次郎努力安慰他,二人过得十分愉快,夏天就这么过去了。《剑来》作者Young university student Hugo (Gustav Lindh) falls in love with promising violinist Agnes (Evin Ahmad), but something happens that changes his life completely. Moving on, the story turns into a romantic drama-comedy with great portions of humour and warmth, as Hugo ends up at Circus Margôt and is drawn into that absorbing existence.