The New Hampshire woods just got a lot more dangerous. As a brutal winter storm slams the region, Officer Nathan Superchi is in a race against time. A hunter has vanished, his phone is dead, and the snow is burying his tracks. With the blizzard closing in, Superchi must push into the deep woods before the trail goes cold for good. Meanwhile, K9 Aspen proves why she’s a legend in the field, assisting local PD in a specialized search for hidden evidence. From the tension of the local fishing derby to the elite K9 training with Cora, this is what it looks like when the "Thin Green Line" meets the worst of winter.