The second part is not as logical as the first.
Instead of a story about the struggle to survive in a world where loudness can be dangerous, the viewer is shown a beautiful tale of courage, self-sacrifice and faith.
It is a pity that the whole of the first part was lost. People burning fires, it turns out, are sitting without food and water and do not consider it necessary to look for other survivors who are trying to rob each other, and this is with full shelves in stores.
The secret weapon against the aliens is ridiculous. Did no one at least try to deal with rumours in this way?
The ending is a happy ending, which was attracted by all possible conventions, despite the idiotic behavior of the characters, which only moved the whole plot.
Weak, frankly weak after the first part.