Johan realises they've been searching in the wrong direction all along. He urgently redirects the search for his missing wife, which can resume after the storm has finally passed.

Back in Polaris V, the team did not find the radio parts they were looking for. But Maggie insisted to take the body found in the Polaris V back to Polaris VI.

Arthur reveals that the body they found buried in the snow doesn't belong to any of the Polaris VI. It appears to be from a failed mission that ended in tragedy.

The surviving winterers are now certain that the killer was one of them. But who? And why? They need help. The Sno-Cats were their only chance to get close enough to the Argentinian station to call for help.

A storm builds around the base and the search for Annika must be called off. Pressed by Johan, Maggie tries to remember what happened after Miles' death.

In the middle of the winter, a small group of scientists in charge of an international base in the Antartica during the long polar nights stops communicating with the outside world.