With no police support able to arrive from Reykjavik until the snowstorm clears, Andri and his colleagues need to work fast. It seems a hopeless situation, but with a suspect in custody awaiting questioning and a body awaiting forensic tests Andri is desperate for them to prove themselves and make a breakthrough in the case.

With the murderer still at large, unrest is beginning to grow among the still-trapped townspeople and tourists. The police's list of potential suspects is becoming larger, but with discontent growing and the looming threat of an avalanche above the town, they face a race against time to unravel the mystery.