Eight space cargo-ships disappear without a trace within three days, and the orbit station "Margot" has suddenly fallen silent. It’s down to science officer Maria Scholl to find out what happened to them.

1929: Marie Lehning, a farm worker from Warmsdorf on the Baltic Sea, falls in love with the fisherman's son Mingo. Both complete an apprenticeship in Lübeck. Marie wants to become a seamstress, Mingo a carpenter. After their first night of love, they swear eternal fidelity. But Marie has to return to the village, her mother is ill and her siblings are unprovided for. She starts working as a maid on a farm. Unexpectedly, she meets the young Kurt Meier from Berlin, whom she knows from before.

Who doesn't know the dream of an unexpected million-dollar inheritance? For microbiologist Dr. Wolf, it seems to come true when an American lawyer visits him to tell him about the death of his distant uncle in the USA. Wolf is to receive an inheritance worth millions, but on one condition: He must continue to run his uncle's factory in the USA. The natural scientist is also offered the prospect of a research position at Camp Detrick. But after the memorable visit, Wolf discovers a listening device in his apartment. When he informs the People's Police, more and more inconsistencies come to light.