How could I live without you?

What connects the past with the present? Of course, love. And music. But only if it's really good. Lili is a typical girl of our time: she's lonely and tries to convince herself that this is fine for her. But one day, she finds an old package of letters in her parents' apartment, which her mother kept hidden. Of course, she doesn't hesitate much, she starts reading it, and the past comes alive for her... ...an unforgettable summer in the early nineties, when three good friends are on vacation at Lake Balaton, and only one of them, Eszter (Törőcsik Franciska), wants to stay faithful to her boyfriend , despite the challenges she faces. But her plans, which are usually followed with precision, are slightly messed up when she meets a guy (Márk Ember) who is easygoing, funny and has another very good quality: he plays in a band and performs…