Heinrich Danioth (1896-1953) is the most prominent artist from the canton of Uri and, at the same time, one of Switzerland's outstanding painters in the 20th century. Although most people know of the red devil he painted on the rock face of the legendary Schöllenen Gorge, the artist has remained relatively unknown to the public. Primarily based on Danioth's diaries and letters, the film portrays the life story of an artist lapsed into undeserved obscurity.