JAM (Christian Clavier), a French "master of the universe" is on the brink of a major takeover when he starts suffering from anxiety attacks. His doctor (Lhermite) thinks it is to do with childhood experiences and suggests he searches back in his mind to something that could be the trigger and will prove to be the antidote.
The action takes place - as the title suggests - in a Palace, a really nice hotel. Funny scenes happen in different places: the kitchen, the reception, the elevator, the rooms, ...
