The story of a woman who dreams to join an intervention group in the police department called RAID. Unfortunately, she is rather clumsy and both her family (and soon to be family-in-law) and a veteran of the RAID do not approve. However, Johanna is determined to prove them wrong.

In the midst of rehearsals for a new play, amateur dramatics proponents Colin and Kathryn receive the shattering news that their friend George is fatally ill and only has a few months to live.

Doctor Knock is a former thug who has become a doctor and arrives in the small village of Saint-Maurice to make his fortune according to a particular method. It will make the villagers believe that they are not as healthy as they might think. It is thus that he will find in each one an imaginary symptom, or not, and thus will be able to exercise his profession lucratively. Under his seductive looks and after gaining the confidence of the village, Knock is on the verge of achieving his ends. But his past catches up with him and an old acquaintance disrupts the doctor's plans.