Jerome, 35, is a yacht salesman in Nice. But, according to him, in his spare time he is also an astronaut, a karate world champion and a dear friend of Miss Universe. Jerome is a compulsive liar: he lies to everyone, always, about everything! Nobody believes him, but that doesn’t stop him from telling lies. One day Jerome wakes up and discovers that all his lies have come true… and it’s just the beginning of troubles!