Honza Pavelka (Jan Hrusínský) wins the junior motorbike speed races. His thirteen-year-old brother Martin (Roman Cada), his assistant and biggest fan, answers the questions of his schoolfriend Pavlína in a superior tone. Student Zuzana (Libuse Safránková), who gave her scarf to Honza to wear around his neck for the races as a talisman is Honza's girlfriend. He met her when he came to her parent's home to repair the TV set. Honza declines an invitation to celebration with his friends. He goes off with Zuzana instead, but she refuses his intimate advances. The offended young man, who is about to serve his two years in the army, tries to blackmail her emotionally and the couple breaks up. Martin tries various schemes to bring them together again.
Libuše Šafránková
Jan Hrušínský
Roman Čada
Ivana Maříková
Slávka Budínová
Josef Bláha
Blažena Holišová
Vladimír Menšík
Zdeněk Řehoř
Otakar Brousek
Bedřich Prokoš
Ladislav Trojan
Václav Fišer
Jiří Lír
Miroslav Homola
Ludmila Roubíková
Jana Švandová
Josefa Pechlátová
Zdeněk Šavrda
Vítězslav Černý
Jiří Kodet
Jarmila Orlová
Petr Skarke
Jiřina Bílá
Karel Bělohradský
Jan Kuželka
Václav Bahník
Michael Tarant
Jarmila Beránková
Rudolf Kalina
Yvetta Kornová
Jana Matiášková
Jiří Prager
Karel Sekera
Karel Smyczek
Luděk Svoboda
Jan Hartl
Josef Havlín
Vladimír Hora
Karel Koš
Max Kulhavý
Ivo Moravus
Jiří Stárek
Jiří Kvasnička
Vladimír Navrátil
Olga Navrátilová
Slávka Hamouzová
Dagmar Patrasová
Zdeněk Deyl
Miloš Schmiedberger
Vlastimila Vlková