Prime numbers are divisible only by one and themselves. These numbers are solitary and incomprehensible to others. Alice and Mattia are both "prime", both haunted by the tragedies that have marked them in childhood: a skiing accident for Alice which has caused a defect in her leg, and the loss of his twin sister for Matthew.
Alba Rohrwacher
Alice Della Rocca
Luca Marinelli
Mattia Balossino
Aurora Ruffino
Viola
Arianna Nastro
Alice Della Rocca (young)
Tommaso Maria Neri
Mattia Balossino (child)
Isabella Rossellini
Adele
Maurizio Donadoni
Umberto
Roberto Sbaratto
Pietro Balossino
