Svalbard, Norway, 1977. Engineer Yuri takes the last boat to the Soviet outpost of Pyramiden, just as the sun sinks for three long months. When his ambitious assistant Semyon is found dead in a mine, the circumstances seem strange. Yuri still plays by Stalin-era rules: Don't trust anyone; Keep your head down; Look after number one. Yet is his tempestuous love affair with the fickle, brooding Anya blinding him? On an island where the vodka follows freely and anyone could be a secret agent, even the people closest to you are not always what they seem.