In a decaying world invaded by insects, the only bulwark of humanity is Babel, an unspoiled city that is the dream of every inhabitant of the outside world. Luca and Sara have been applying to Babel for months now, and he is slowly dying. In the darkest moment for them, when Sara seems to be making a drastic decision, the request is accepted in the immigration offices of Babel.
Fortunately, a spark of hope prevented Sara from poisoning both of them, so that the letter with the good news can reach the recipients.