San Domingo (1970)

This surrealistic experimental film finds the son of a young nobleman staying with hash-smoking hippies in a seamy section of Munich. He falls for a hippie girl who is involved in shaking down the young man's parents for money. She falls in love with the young man but the group continues to extract money from the parents in return for their wayward son. When he discovers the shakedown, his rage leads to tragedy for the star-crossed lovers.

Unfortunately the movie San Domingo is not yet available on HBO Max.