The invincible agent Cyril Juan Borguette alias W4C has been assigned a mission to go to a hotel in Prague, get hold of a saltcellar with a plan for the military exploitation of Venus hidden in it, and hand it over to the beautiful agent Alice. He will have to compete for the saltcellar with other agents working for the world's various greater and smaller powers. The head of the Prague counter-intelligence unit gets news of agent W4C's mission. Deficient in personnel, he nominates accountant Foustka as agent 13B. Mr Foustka takes his dog Pajda with him and the two head for the airport. Pajda helps him track down agent W4C in a classy hotel that becomes the battleground for the interests and plans of the secret agents from different countries, each trying to get hold of the precious saltcellar.
Jiří Sovák
Jan Kačer
Květa Fialová
Jan Libíček
Jiří Pleskot
Jiří Lír
Jaroslav Kepka
Václav Kotva
Zdeněk Blažek
Zdeněk Braunschläger
Jaroslav Cmíral
Karel Engel
Ivo Gübel
Josef Hlinomaz
Karel Hovorka
Eduard Pavlíček
Vladimír Pospíšil
Svatopluk Skládal
Jaroslav Tomsa
Oldřich Velen
Lubomír Kostelka
Otto Šimánek
Vlastimil Hašek
Antonín Šůra
Věra Bauerová
Jan Cmíral
Jaroslav Heyduk
Alena Kreuzmannová
František Husák
Hana Talpová
Helena Růžičková
Luďa Marešová
Petr Čepek
Walter Taub
Miloš Vavruška
Otakar Rademacher
Antonín Pražák
Stanislav Zindulka
Karel Bezděk
Oldřich Hoblík
Jiří Sedlmayer
Vladimír Horáček
Viktor Klinger
Karel Koš
Čestmír Preclík
Jana Weberová
Jana Sedlmajerová
Dana Reimová
Zdeněk Skalický
Isabella Tylínková
Zuzana Talpová
Vladimír Šmeral