Summer 1943, Piedmont, Italy. Milton loves Fulvia who plays with his love: she only likes the depth of his thought and the letters he writes to her. One year later, Milton has joined the Resistance and fights beside other partisans. He learns during a conversation that Fulvia was secretly in love with his best friend Giorgio, a partisan like him. Milton decides to go find Giorgio in the Langhe region of Italy with all its misty hills...But Giorgio has just been arrested by the Fascists.
Elena and Ernesto are a couple who are bitterly torn apart by the death of their only child. Three years later they have both somehow managed to start a new life. Until destiny forces them to reconnect and understand, they never really stopped loving one another other.
Um número primo é inerentemente uma coisa solitária: só pode ser dividido por si próprio ou por um; nunca encaixa verdadeiramente com outro. Alice e Mattia também se movem nos seus próprios eixos, sozinhos com as suas tragédias pessoais de infância. Mas à medida que vão entrando na idade adulta, os seus destinos parecem irrevogavelmente ligados...
