The film portrays the life of the famous German designer, though images and narration. It's a storytelling through words and sketches.
In this film, he manages to capture Lagerfeld's aesthetic (by using great photography), to pose "irritating" questions that the designer does not seem to wish to answer and to also show an honest side of Karl's, especially when he admits that he has nothing to fill his life but his work.
Make no mistakes though: Lagerfeld manages to manipulate the camera as he wishes and reveal exactly as much as he wants. Let us not forget that apart from an artist, he is also a businessman.