A female parent and her three daughter — romanticist Bee, reasonable Evie, and kid of nature Daisy — busy the titulary glass edifice, which has be wholly seal off to protect its resident from a dementia-inducing toxin name the scintilla that’s poison the air outside. Fearful of become like the lose soul who roll the abysm outside, the household maintain a appreciation on their past times by perform sacred ritual. When Bee interrupt the rule and let an injured alien into their thick, the household moral force is shatter everlastingly, as concealed truth upend the illusion the woman have got work so difficult to protect.