As others have said on the messages boards (and I won't refer to them to avoid spoilers), there were a lot of plot problems in this movie, but it didn't matter. The basic premise is absurd: an important CEO, photographed with a young supermodel, tries to convince his wife that the supermodel is really dating the commoner (who works as a valet) who just happened to be walking past when the picture was taken. The CEO pays the valet to pose as the supermodel's boyfriend, the wife doesn't buy it, and things progress from there. The valet is a nice guy who is down and out, but doing the best he can with what he was given; the CEO is a bad guy: in an American movie, you could guess the outcome, but this is a French movie, so you're on your own!
On a side note, Francis Veber also wrote and directed Le dîner de cons, which we found very disappointing after enjoying La Doublure.
On a side note, Francis Veber also wrote and directed Le dîner de cons, which we found very disappointing after enjoying La Doublure.