Dust picks up where Shift left off. It is now clear that the status quo cannot be maintained, at least in Silo 18. Solo and Juliette are re-united as tragedy unfolds around them. The path to sustainable survival is uncertain. Meanwhile in Silo 1, Charlotte and Donny wrestle with trying to help Juliette over sporadic radio links and under constant threat.
Despite having some issues with pacing, this is a satisfying conclusion to the series. It is nowhere near as ponderous as Shift since there is more actually happening to replace the overlong internal monologues. The narrative moves towards a conclusion that, if not a happy ending for all, at least gives hope for the future.