Pascal Abikanlou - Sous le signe du vaudou AKA Under the Sign of the Voodoo (1974)

A young man neglects the ritual offerings to the voodoo deities and invokes their anger. His family suffers the consequences: house burned, crops destroyed. He leaves for the city to try to help them, but finds himself caught up in drugs. He ends up meeting a young girl who encourages him to return to the village. They marry in the voodoo tradition and the curse is lifted.