Local Motion Pictures

A mother and her three daughters — romantic Bee, sensible Evie, and child of nature Daisy — occupy the titular glass building, which has been completely sealed off to protect its occupants from a dementia-inducing toxin called the Shred that’s poisoning the air outside. Fearful of becoming like the lost souls who wander the abyss outside, the family keep a grasp on their past by performing sacred rituals. When Bee breaks the rules and lets an injured stranger into their midst, the family dynamic is shattered forever, as hidden truths upend the illusions the women have worked so hard to protect.

Rachel, her father David, and adopted brother Isaac flee an attack on their home that leaves David disabled, and everyone traumatised. When they arrive at Janice’s farm, they are welcomed in and given asylum. While David convalesces, Janice asks Rachel to marry her youngest son, Caleb. With the offer of marriage looming over her, she learns of hidden tensions within the family, slowly illuminating cracks in the happy facade Janice seems intent on living. Rachel is determined to go North, where rumours tell of a land less blighted than the one they live in.