Don't Lean Out the Window (1977)

Encouraged by the stories of guest workers who pay visit to their homeland, a young man Filip finds himself on a central station in Frankfurt on the Main, Germany. While looking for his old friend Mate who would help him to get around in new environment, Filip experiences one trouble after another until he finally finds Mate lethally wounded.

Unfortunately the movie Don't Lean Out the Window is not yet available on HBO Max.