Leading chemist Hans Schramm is betrothed to Hanna, but falls in love with her younger sister Franka. The two attempt to repress their feelings, but eventually begin an affair. When Hans is extorted by a group of West German agents, who demand to know about his secret work, he is gripped by panic and decides the only way out is to flee to the West …
| Actor | Role |
|---|---|
 Doris AbeßerFranka | Franka |
 Ulrich TheinDr. Hans Schramm | Dr. Hans Schramm |
 Annekathrin BürgerHannelore | Hannelore |
 Maria BesendahlMutter Schramm | Mutter Schramm |
 Hans LuckeNot listed | Not listed |
| KKurt DunkelmannNot listed | Not listed |
 Micaela KreißlerNot listed | Not listed |
| HHeinz LaggiesNot listed | Not listed |
 Karl Heinz OppelNot listed | Not listed |
| DDitha CullmannNot listed | Not listed |
| EErich FritzeNot listed | Not listed |
| KKlaus EbelingNot listed | Not listed |