Due lettere anonime

After years at the Russion front in WW II, the Italian soldier Bruno returns home. But he receives an anonymous letter warning him that during his absence, his fiancée Gina has begun an love affair with Tullio, his friend and workmate at a printing office. When Gina finds out that Tullio himself has written that letter, she questions the ulterior motives of her lover. And then, another anonymous letter triggers dramatic events.