It's the end of the summer holidays in a drab neighborhood of Hamburg. Young boxing talent Mauser has only one goal in mind: the boxing competition that could change his future. When he runs into Jackie, his whole world turns upside down. Is this more than attraction? When his father disappears, Mauser sets off to find him and embarks on a journey through the world of music, psychedelia, violence, love and a biblical thunderstorm. Adapted from the internationally released novel by Nils Mohl, “Once upon a time … Indianerland” is a wild genre mix combinig urban western, boxer film, road movie and music video.