The German Schneider has long been looking for a coin known to have been struck in Bulgaria. He decides to spend his summer holiday there. On the road, a rock group going on a tour to Bulgaria overtakes him. The musicians' car breaks out and Schneider tows it to the nearest garage. At the border, the Bulgarian musicians welcome their German colleagues. Schneider meets the singer Yana and offers to give her lift to the seaside. The collector discovers that she wears the ancient coin on a chain round her neck. Yana and Schneider fall in love and thus put behind them all their differences over the ancient coin. The Yana's concert is a smashing success. Schneider and Yana leave Bulgaria together.