Thefts, burglaries, petty crimes of all kind are developing. The police station is ccrowded. It becomes hard for our cops to cope with the stealing of evegetables in a garden and the shop lifting of a beautiful whore and the assault of an old lady by two teenagers.

Everybody goes out on Saturday nights. Teenagers are bored and get drunk, girls get dressed, boys escape from their homes. And sometimes things go wrong. Teenagers get drunk to coma. Even parents are out of their minds. Everybody shows up at the police station. The night will be long, very long.

An epidemic of flew has emptied the police station. There is a small riot in the suburbs at the Cité des Muguets. Fighting ends up in throwing rubbish bins. The police has hard times waking up a drunk asleep in his car while his daughter is crying on the back seat.

Things quickly go wrong. An arrested boy tries to commit suicide in the police station. His father gets very angry but the family is so bizarre that Kreusky and her team decide to dig deeper. The drug deal in the Cité has brought the narcotics at the Police station.

It's Christmas Eve. The Christmas tree is in the cafeteria, everything's fine. Except that an ordinary man decides to burglar a small jewellery. He takes the saler as a hostage. A school teacher fails at taking care of her own son and she accuses her sister to lock her up.