Soul Cage is a non-verbal documentary, which shows the process of creation. The specially composed music builds the dramaturgy of the film on equal rights with the image. This “cinematographic sonata” explores the boundaries of documentary and operates with details, shadows and mystery. The film gets inside the art process of Johanna Forsberg, who lives in the north of Sweden. From the raw metal mesh, cold and resistant, through the fragile moment of creation, to the darkness of the workshop – where everything is possible and the creations have their own life and souls.