神医 Der Medicus (2013) 见: movie.douban.com/subject/10757580/A temperance lecturer's fiancée learns he has a child by his ex-mistress, and that he is an incurable dipsomaniac.
After his mother dies and father goes to fight in World War II, a young boy moves in with his aunt and uncle who live in the countryside. Lonely and unhappy, he starts believing he has super powers. Then a "dead" man shows up.