The young Prince Charles (Jaromír Hanzlík), the future King of his country Charles IV, is being educated at the French court in the company of his fiancée Blanche (Daniela Kolárová). One day he receives a summons from his father John of Luxembourg (Milos Kopecký) in Italy. He leaves for Italy accompanied by a deputation from Bohemia. On the way the prince's company fights a battle with armed Milanese against heavy odds. Thanks to Charles's perspicacity, the prince's almost naked soldiers win through. In Lucca in Italy Charles joins his father, and here he experiences an amorous adventure and escapes from the traps laid by the Italian rebels.
| Writing | Karel Steklý | Screenplay |
| Directing | Karel Steklý | Director |
| Writing | Jan Procházka | Screenplay |
| Camera | Jiří Tarantík | Director of Photography |
| Writing | František Kubka | Book |
| Costume & Make-Up | Jan Kropáček | Costume Design |
| Editing | Jan Kohout | Editor |
| Directing | Jaroslav Pour | First Assistant Director |
| Sound | Jiří Hora | Sound |
| Production | Ladislav Kalaš | Production Manager |
| Camera | Jan Kváča | Camera Operator |
| Directing | Zdeněk Maršálek | Assistant Director |
| Camera | Vladimír Smutný | Assistant Camera |
| Art | Přemek Longa | Production Design |
| Art | Milan Kubík | Art Direction |
| Art | Rudolf Beneš | Set Decoration |
| Art | Václav Kozel | Set Decoration |
| Art | Vladimír Mácha | Set Decoration |
| Costume & Make-Up | Slávka Doležalová-Kulhavá | Costumer |
| Costume & Make-Up | Božena Černá | Costumer |
| Costume & Make-Up | Ladislav Bacílek | Makeup & Hair |
| Costume & Make-Up | František Havlíček | Makeup & Hair |
| Costume & Make-Up | Marie Zedníková | Makeup & Hair |
| Production | Jaroslav Vágner | Unit Production Manager |
| Production | Adolf Široký | Unit Production Manager |
| Production | Alena Řepová | Assistant Production Manager |
| Sound | Jaromír Klempíř | Original Music Composer |
| Sound | Štěpán Koníček | Conductor |
| Writing | Pavel Kopta | Lyricist |
| Writing | Jiří Štaidl | Lyricist |
| Writing | Jan Procházka | Creative Producer |
| Production | Erich Švabík | Executive Producer |
| Crew | Marie Hejzlarová | Script |
