Knock

Knock, a retired crook-turned-doctor, arrives in the small town of Saint Maurice. He intends to implement a scheme to make him rich by persuading the villagers that healthy people are simply people who don't realise they're unwell.

Knock is a 2017 comedy movie directed by Lorraine Lévy, starring Alex Lutz, Ana Girardot, Sabine Azéma. It holds an IMDb rating of 6.1/10 from 4,491 votes and runs 1h 53m.