Adolfo Cocchi has a building firm but his plan to build a set of buildings is been stopped by an old former Garibaldian, Don Leopoldo, who refuses to sell his property. A group of young people go to his house to play and sing. Marcella, Cocchi's daughter, who has a beautiful voice, goes to visit Leopoldo and falls in love with Paolo. They have an idea: open a night-club called "Io bacio... tu baci"...

Defeated Germany has just been divided into two zones ( Soviet and Allied ) when Hans, a young inhabitant of Berlin, decides to cross the demarcation line to join his family.

In late 19th century Sicily, handsome free-spirit Liolà wanders into town, where he encounters an old flame now married to a wealthy landowner.

Rome. Some young people with initiative try to realize their projects.