A young space medicine scientist who goes to Vostok Station (Antarctica), the coldest point on the planet, to observe how the lack of sunlight affects eyesight. The last plane departs and polar explorers are in absolute isolation. Days drag on, weeks look the same. NIKOLAI repeats one and the same operation. A voice message from his fiancée. She can't wait any longer. Several polar explorers refuse to take part in the experiment. From this moment we see him alone at the station. Lack of communication sharpens his imagination. Are we ready for long space flights spiritually, and not physically?