There's nothing to say better than martin scorsese's words about this amazing work of art :

A couple of years ago, I watched a first film called Hereditary by a director named Ari Aster. Right from the start, I was impressed. Here was a young filmmaker that obviously knew cinema. The formal control, the precision of the framing and the movement within the frame, the pacing of the action, the sound — it was all there, immediately evident.

But as…