Captain Jim Leslie, a US Air Force pilot, is transferred to a remote Alaskan base not far from the Soviet border. Here he meets his old friend Harris again and falls in love with Brenda, the commander's daughter. He then comes into conflict with her fiancé, Senator Gordon Gray. At his instigation, he is sent on a dangerous mission with Harris and the navigator Hester: During a storm, the buoys deployed to locate Soviet submarines must be checked. During the emergency landing on an ice floe, Harris suffers a life-threatening injury. They are in Soviet territory, but in view of the situation Jim disregards the radio ban and sends a distress signal. A Soviet submarine appears, Harris is operated on and they are helped to get the plane ready for take-off. Arriving at the base, Jim is arrested. Brenda turns her back on him.

In 1596, the Dutchman Willem Barents sets sail on a long voyage with two ships to find a north-eastern sea route to China for the Amsterdam merchants. Ice masses and storms force the prudent navigator Barents to separate from Rijp, the captain of the second ship, so that he can organize a rescue operation in Holland. Trapped in the polar winter, Barents and his crew hope for help...

The Berlin Volkseigene Betrieb (VEB) Komet is planning a company outing. Willi Redlich, member of the party committee, votes like the others: The relatives stay at home. But he doesn't dare tell his wife Susanne. So she does the work of renting the "Waldschlösschen" restaurant for him - without his knowledge. When Willi wants to book the seats, everything is fully booked and he switches to the "Sonnenburg" opposite. Meanwhile, word has gotten around among the women that they are excluded. They plan a counter-event. On the day of the excursion, both groups are sitting in their inns and the women make sure that they can still celebrate together.

At the end of the 1950s, the production of optics in the German Democratic Republic has reached top quality and instigates interest in the West. When national demand rises strongly and at the same time the export to South America heavily decreases, the Volkspolizei - the GDR police force - starts to look into the case. Two seemingly unrelated cases are the starting point for the investigation by second lieutenant Schellenberg of the department for optics racketeering: An old woman who was arrested in the Berlin city railway for trying to smuggle a pair of binoculars to West Berlin, and a dead person in an area of allotments who was involved in obscure dealings with optical devices.