Clean Slate (1981)

1938, in a French african colony. Lucien Cordier is the cop of this village, populated with blacks and a few whites (usually racialist and lustful). He is a washout, everyone (including his wife Huguette) humiliates him. He never arrests anyone and looks at elsewhere when a dirty trick occurs. But one day, he turns into a machiavellian exterminating angel.