Moshimo, Japan. The annual fireworks festival is about to take place and a group of schoolboys, arguing over whether they are round or flat when viewed from different angles, set out to find it out.
The ambitious police officer Cruchot is transferred to St. Tropez. He's struggling with crimes such as persistent nude swimming, but even more with his teenage daughter, who's trying to impress her rich friends by telling them her father was a millionaire and owned a yacht in the harbor.
To be closer to his children following his divorce, Laurent Monier, a history and geography teacher in a peaceful provincial high school, accepts a position in a sensitive college in the Paris suburbs. He is assigned the hardest class, the fourth techno, and he finds an apartment in the Cité des Muriers, a particularly difficult district.
Energetic priest Don Camillo returns to the town of Brescello for more political and personal duels with Communist mayor Peppone.
Angry, because he is making too many headlines with his gang-busting activities, the police chief transfers Lt. Lewis Nagel to the sleepy suburban town of Fairview, where he is followed by reporter Steve Withers because he knows Nagel will find a story.