After their mother dies, Bronia takes her little sister Marie under her wing and they grow up obsessed with the same dream: to study and “become somebody”. But in the 19th century, doors of Polish universities are closed to women. Bronia and Marie make a pact: Marie will work as a governess to sustain Bronia’s medicine studies in Paris and once Bronia has graduated, it will be Marie’s turn. The effervescence of their student years, their first loves, and the kilometers that separate them will in no way weaken the unbreakable tie that binds them. One will become Marie Curie, the first woman to receive the Nobel Prize, and the other will be one of the first female gynecologists in the world.