The film follows Kaspar Hauser (Bruno S.), who lived the first seventeen years of his life chained in a tiny cellar with only a toy horse to occupy his time, devoid of all human contact except for a man who wears a black overcoat and top hat who feeds him.
Bruno Stroszek is released from prison and warned to stop drinking. He has few skills and fewer expectations: with a glockenspiel and an accordion, he ekes out a living as a street musician. He befriends Eva, a prostitute down on her luck and they join his neighbor, Scheitz, an elderly eccentric, when he leaves Germany to live in Wisconsin.
A small Bavarian village is renowned for its "Ruby Glass" glass blowing works. When the foreman of the works dies suddenly without revealing the secret of the Ruby Glass, the town slides into a deep depression, and the owner of the glassworks becomes obssessed with the lost secret.
