Helena, a free-spirited single café owner, takes her eight-year-old son Mikuláš to the mountains for a quiet Advent stay but, through a mix-up, ends up at a remote high-altitude lodge run by adventure guide Richard, his spirited daughter Zuzka, and his sociable brother Mišo. Unbeknownst to Helena, her parents also arrive, insisting the family spend Christmas together. Amid snowbound isolation, cultural clashes between city visitors and mountain folk, playful rivalries between the children, and unexpected challenges transform her planned retreat.
