Réveillon chez Bob (1984)
Directed by Denys Granier-Deferre

Film Synopsis

After concluding a business trip in the United States, Louis Alban returns to Switzerland with the intention of spending New Year's Eve at home by himself.  Louis illustrates children's books for a living and is now living alone, after separating from his wife Madeleine and their infant son Jérémie.  When he gets back, he receives a message from his son alerting him to the fact that he is being treated badly by Bob, the man his mother is now living with.  Anxious and infuriated by this cry for help, Louis takes note of the address indicated in his son's message and hurries off to rescue his little boy.

Arriving at a modern apartment complex in Paris, Louis finds it hard to get his bearings and soon realises that finding his wife's flat is going to be far more difficult than he had imagined.  He runs into a couple who have the same problem - a garage owner named Thierry and his girlfriend Florence.  As this trio struggle to find their way in this hellish concrete labyrinth they find they have to cope with not only some bizarre encounters but also some life-threatening incidents.  In the end, Louis discovers that he was lured to Paris under false pretences and that the infamous Bob doesn't even exist.  This is all part of a cunning plan by his son to get his parents back together again...