He is suffering from transient global amnesia, remembering nothing about himself and his current situation, although recalling random episodes from his remote past.
And despite Giovanna's protests, Filippo brings him back to their home for the night so that he can take him to the police the next morning in the hopes of unraveling the mystery.
The old man experiences strange episodes, flashbacks of sorts, that reveal clues to his mysterious past.
However, Lorenzo's job is transferring him to another city very soon and Giovanna is put in an awkward spot having to make a very quick decision.
Giovanna takes Simone's suit to be cleaned and discovers a love letter in the jacket pocket addressed to him from a certain Davide Veroli.
Davide helped her make some big decisions in her life, like pursuing her dream to work in a bakery and having the strength to fight for her marriage and her children.
He also stated the film has a "puzzle-like narrative, is consistently involving" and director Ferzan Ozpetek's screenplay will gain him a "wider art-house following".