Before being extradited to Africa to stand trial, a notorious Belgian criminal is entrusted to the Marseilles police department for less than 24 hours. But the wily crook convinces bumbling policeman Emilien he's a lowly Belgian embassy employee who got railroaded by the brilliant master criminal.

April, an idealistic lawyer dedicated to lost causes, agrees to defend Cosmos, a dog that has bitten three people, leading to the first canine trial. She has no choice but to win the case, as otherwise, her unusual client will be put down.

The whole Bélier family is deaf, except for sixteen year old Paula who is the important translator in her parents' day to day life especially when it comes to matters concerning the family farm. When her music teacher discovers she has a fantastic singing voice and she gets an opportunity to enter a big Radio France contest the whole family's future is set up for big changes.

Nicolas has a happy existence, parents who love him, a great group of friends with whom he has great fun, and all he wants is that nothing changes. However, one day, he overhears a conversation that leads him to believe that his life might change forever, his mother is pregnant! He panics and envisions the worst.