The Earthling(1980)

Patrick Foley has been traveling all his life. He is tired of wandering and wants to spend the last days of his life in a remote valley in Australia, where he grew up. He meets Sean on this difficult path. Shaun is a desperate city boy whose parents lost their lives in an accident in this unpleasant land. He is unable to accompany this boy to the civilized world, that's why Patrick decides to take the boy with him to the valley and teach him the ways of survival...