Located in the ice sheet forest near the Arctic Circle, there lives a pair of ordinary father and daughter with extraordinary skills. Father Eric Heller (Joel Kinnaman) is a former CIA agent who was active in Eastern Europe and Central Asia in the 1990s and has a wealth of experience. However, in the end, for some reason, he and his daughter Hannah lived in seclusion in this cold place rarely seen by human beings. After more than a decade of hard training, Hannah (Eastman Greeder Myers) has finally grown into a combat girl with extensive knowledge and excellent skills. One day, Hannah, who thought she was ready, pressed her father's signal transmitter, and soon the United States received the news. Eric's then contact Marissa (Miri Enos) claimed that the agent who had disappeared for many years had a very sensitive secret, so under her auspices, a round-up with ulterior motives immediately began. Hannah's frail body has been thrown into the bloody battle.
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