Ernesto and Filippo, two high school teachers, couldn’t be more different: Filippo is a cheerful liberal who is constantly online. Handsome and youthful, he is a serial seducer on the social networks. Ernesto, instead is a stern conservative, rigorously computerless. He is probably the last person around who still has a first-generation cell phone and his teaching methods are very traditional. They used to be best friends but an unresolved fight kept them far apart, until the day fate intervened and they found themselves teaching at the same...