The action is set in Poland, in the Podhale region, in the Winter of 1939. Magda, fifteen years old, is an excellent skier. She joins the Polish Resistance and helps by transporting documents and helping fugitives cross the mountains of Slovakia. One day, she comes to know that a group of twenty-three pilots urgently needs to cross the border, as the Gestapo is at their heels. She comes up with a risky plan to lure the Nazis away, allowing the pilots to pass.