Back-to-school! For troublemaker Toto, it’s the best playground for fooling around. When a sculpture collapses during the opening of a museum, Toto is immediately blamed. To prove his innocence, Toto has no other option but making a pact with Igor, the school nerd. In exchange for his help, Toto will help Igor being cool. The unlikely duo turns into little detectives. A fun and exciting adventure begins…

马赛，1905 年 7 月。年轻的 Marcel Pagnol 刚刚完成他的小学学业。三个月后，他将进入“高中”。三个月……在你这个年纪的时候是永恒的。因为它是假期时间，大城市的孩子，期待已久的回归他亲爱的欧巴涅山丘，那些“我父亲的荣耀”和“我母亲的城堡”让他快乐。

居住在法国南部乡村的老人保罗，在一个暑假突然迎来了三个不速之客——来自巴黎的外孙女和外孙。认知的分歧加上与女儿多年的失和让保罗与三个年轻人难以顺利相处。祖孙几个你来我往地过招，外婆不停从中调和。在不知不觉中保罗与外孙们的感情距离拉近了。