The premise here is a bit like a low tech version of Michael Crichton's Westworld, in which the seriously loaded can book themselves a fully immersive historical experience. Sans robots.
Around it we get a sort of European farce with frenetic, self-consciously smart repartee, old people sex, and all the usual accoutrements.
A lot of it is un peu annoying, frankly. But there are some rather charming parts and almost all of these feature Daniel Auteuil as Victor, who paces and pitches his performance slightly differently to everyone else around him.