Bird Box depicted the outside world becoming a dangerous place, filled with creatures which drive humans mad when perceived. In this direct sequel, the creatures are still very much here; Malorie and her children, Tom and Olympia, live safely amongst other survivors at a school for the blind. But in Malorie’s visceral opening scene, the madness – and the creatures – break in, and they are forced to flee once more. Ten years on, Malorie has raised the teenaged Tom and Olympia to “live by the fold” (the blindfold) and follow the strict rules which have allowed them to survive so far. The children don’t always agree with her – and neither does the rest of the world.