Thanks to his psychoanalyst Charles, Simon has found a certain stability in life. He's editor of a series in a publishing house, has a girl-friend, Myriam, who is attached to him (too attached?), and lives on a converted river barge moored in central Paris. Everything's just fine - so much so that Charles tells Simon he no longer needs therapy. For a little while Simon feels on top of the world, then has to face the truth: without therapy he just can't seem to make a go of things. But when he begs Charles to take him back, the analyst refuses. Charles says that Simon's analysis is over. Simon can't accept being "abandoned" like this. He forces his way into his shrink's private life, at a time when Charles is going through a bad patch himself: his wife wants to ditch him and he wants to ditch his patients. When Simon receives an anonymous manuscript detailing his innermost fears and fantasies, he gets quite a shock. Charles was one of the few people who knew such personal details. How could he have betrayed him like this? Simon tries everything to make Charles own up: threats, insults, violence, harassment. But when Charles walks onto his houseboat smashing everything in his path, Simon realizes he's gone a bit too far...