A student in May 1968, Marc chose to stand on the barricades. Which his 'friend' Bob took advantage of to run away with his mistress Marlène and... his savings. After such a big disappointment, Marc decided to settle down in the country with another woman called Colette. Ten years later, he organizes group psychotherapy sessions followed by misfits of all kinds. It is during one of these sessions that suddenly appear Bob and his accomplice Jo, chased by the police after they committed a holdup...