The Danube, not always blue but always beautiful, a river that like no other has inspired human imagining to expressions of lyrical beauty and dramatic wonderment.
A young street vendor who is a cockfighting aficionado, attracted by the image of one of them, settles on the ranch of its owner where he falls in love with the foreman's daughter.
A wealthy business man discovers he has a brain tumor and seeks medical help. The business man finds a scientist experimenting with transplanting monkey heads on different monkey bodies.
The old and sick detective superintendent Bärlach has to investigate the murder of his colleague Ulrich Schmied, who was murdered in the middle of the country road.