Daniel, trentenaire, souhaiterait passer ses journées à ne rien faire, comme sa grand-mère, tandis que la vieille dame, elle, envie la jeunesse de son petit-fils.
Daniel, a disillusioned thirty-something, would love to spend his days doing nothing, like his grandmother does, while the older lady envies her grandson's carefree youth. Things get complicated when they accidentally swap bodies.