Salento, Italy, June 1934: A coach stops in the main square of Lizzanello, a tight-knit village where everyone knows each other. A couple gets off: The man, Carlo, a child of the South, is happy to be back home after a long time away; the woman, Anna--his wife--is a stranger from the North. Carlo's brother is there to meet them, and he and everyone else can't help but notice that Anna is as beautiful as a Greek statue. But Anna is not like the other wives. She doesn't gossip or attend church. She reads books no one else has ever heard of. She even wears pants, just like a man, and thinks a woman should have rights just like a man. There aren't many options for a woman with Anna's sensibilities, so when she learns that the post office is hiring, she leaps at the opportunity. A female letter carrier? It is unthinkable. But Anna soon becomes the invisible thread connecting the town as she delivers letters between clandestine lovers, families waiting to hear news of loved ones away at war, even helping those who can't read. But for some in Lizzanello, letters come too little and too late. The seamstress, who was Carlo's first love, can't help but look at Anna as having taken her rightful place. Carlo's niece has put herself in a loveless marriage after an impetuous act of jealousy. And Carlo and his brother find themselves trying to cover up a recently unearthed surprise that could shatter all of their lives.