他，是称霸一方，无数人闻风丧胆的黑帮一哥鯖島（高橋克実饰）。他，是善良荏弱，刚踏上职场不久的社会新鲜人城田（松田翔太饰）。这两个八竿子打不到一起的两个人，某日却因机缘巧合交换了身体！
这看来无比荒谬的事，就连医生也无法解释。两人无奈地决定在变回之前先扮演各自的身份，于是， 鯖島变为儿童咨询救助中心的员工，面对中心里各类孩子的棘手问题，他毅然拿出老大风范儿，用他“与众不同”的另类风格一一完美解决，就有如传说中的那位拯救世界的骑士堂吉诃德！

故事从少女辻泽梁香（广濑铃 饰）与老婆婆林田亚乃音（田中裕子 饰）相遇开始，梁香失去家人，与社会脱节，找不到生存下去的方法，两颗遭遇背叛、欺骗，无法相信他人的心碰到一起，萌生出了某种感情，亚乃音努力保护梁香，假的家庭，假的人生，假的记忆，还有真实发生的事件，让少女逐渐发生改变……

2016 film directed by Hirokazu Koreeda

Three patients of different backgrounds, illnesses and stages are being treated at a psychiatric clinic in Nagano Prefecture. Their cases range from the criminal to merely asocial. That should be that, but soon matters take a darker turn when a corpse turns up and a murder has occurred. The culprit fingered is one of the patients.

On a quiet street in Helsinki, Sachie has opened a diner featuring rice balls. For a month she has no customers. Then, in short order, she has her first customer, meets Midori, a gangly Japanese tourist, and invites her to stay with her.