The ship's first officer, Karel Kip, and his brother, engineer Petr Kip, are convicted as mutineers for the mysterious murder of the captain of the ship James Cook. However, thanks to the intervention of the governor, they only receive life imprisonment in a penal colony. There, they build a hot air balloon with which they escape. The brothers remember that a phonograph was left on the ship, which could be used to identify the captain's real killer...
| Actor | Role |
|---|---|
 Rudolf JelínekKarel Kip | Karel Kip |
 Otakar BrousekPetr Kip | Petr Kip |
 Karel UrbánekNot listed | Not listed |
 Bořivoj NavrátilNot listed | Not listed |
 Jiří AdamíraNot listed | Not listed |
 Jiří KodetNot listed | Not listed |
 Rudolf HrušínskýNot listed | Not listed |
 Karel HouskaNot listed | Not listed |
 Josef VinklářNot listed | Not listed |
| JJan FaltýnekNot listed | Not listed |
 Ilja RacekNot listed | Not listed |
 Ivan VyskočilNot listed | Not listed |
 Vlastimil BrodskýNot listed | Not listed |
| LLadislav KazdaNot listed | Not listed |
 Ladislav MrkvičkaNot listed | Not listed |
 Jaroslav KepkaNot listed | Not listed |
 Stanislav RemundaNot listed | Not listed |
 Dana SyslováNot listed | Not listed |
 Václav SloupNot listed | Not listed |
 Jiří PlachýNot listed | Not listed |
 Ladislav KřiváčekNot listed | Not listed |
| GGeorg PokrovskijNot listed | Not listed |
| OOldřich JanovskýNot listed | Not listed |
 Václav KotvaNot listed | Not listed |
 Otakar BrousekNot listed | Not listed |
| JJiří PragerNot listed | Not listed |
| KKarel MeisterNot listed | Not listed |
| JJiří ŠkodaNot listed | Not listed |
| KKarel HovorkaNot listed | Not listed |