Wenn mein Schätzchen auf die Pauke haut (1971)

The composer Kristian Wernher is supposed to transport uranium-containing rock samples from Brazil to Austria, specifically to Lake Wörthersee, for his father, the head of “Internationale Berg AG”. Everything is carried out in the strictest secrecy, but soon two agents are after Kristian. But that is not his biggest problem. An unpleasant surprise awaits Kristian at the delivery point.