Dr. Wittich is a passionate speleologist who spends more time on his research than on his fiancée Cornelia. As a result, she turns to the rich industrialist Roy, whom she eventually marries. But her heart actually belongs to the explorer and so she is drawn back to him.
| Actor | Role |
|---|---|
 Paul HubschmidDr. Benn Wittich, Biologe u. Chemiker | Dr. Benn Wittich, Biologe u. Chemiker |
 Ilse WernerCornelia | Cornelia |
 Elfe GerhartCharlotte | Charlotte |
 Hermann ThimigHeinemann, Laboratoriumsdiener | Heinemann, Laboratoriumsdiener |
 Ulrich BettacKessler, Compagnon Roys | Kessler, Compagnon Roys |
 Ernst WaldbrunnHerr Peters | Herr Peters |
 Stefan SkodlerNot listed | Not listed |
| MMaria EisNot listed | Not listed |
| HHarry LeynNot listed | Not listed |
| OOtto SchmöleNot listed | Not listed |
| RRobert TessenNot listed | Not listed |
 Helli ServiNot listed | Not listed |
| IIda RusskaNot listed | Not listed |
 Josef FischerNot listed | Not listed |
| JJosefine BerghoferNot listed | Not listed |
| GGaby PhilippNot listed | Not listed |
| FFranz EichbergerNot listed | Not listed |