胸怀摄影师梦想的青年永野均（龟梨和也 饰）是某家家电商城的员工，无论在职场还是家中他似乎都是一个不太讨喜的人。这一天，在快餐店吃饭的永野偷偷拿走邻座某个白领职员的手机，之后更假冒那个名叫大树之人的身份从对方母亲那里骗钱。
A former aristocratic family faces financial hardship and their daughter is introduced to a nice man in the auto repair business, the hope being that a marriage might be of economic assistance to the family. The daughter's family finds it hard to accept this kind of idea and the young man is uncomfortable with the difference in their social standing. However, everything works out in the end and a happy marriage takes place.
与此同时，一年前因战乱而弃国逃亡的瓦爆鲁带着邪恶的魔法师兄弟木修鲁卷土重来，他企图驱逐吴羽，重新统治这片土地。一时间战火重燃，盘桓在此的草帽海贼团被迫卷入其中…… 本片根据日本漫画家尾田荣一郎的同名原著改编，是2008年上映的第九部动画剧场版，也是漫画连载十周年的纪念作品。
