The crew attempts to fix the icebreaker's engine, with disastrous consequences. Something keeps attacking them. With no other options, they must evacuate across the ice. There, Sanna encounters someone who should be dead, and an invisible force pulls a crew member into the fog.

Sanna discovers the truth about her missing father's fate, and that it's all connected to the icebreaker crew. Sanna must face her greatest challenge and end it all through personal sacrifice. What will remain of them, and who will make it back to dry land alive?