In a ruined and toxic future, thousands live in a giant silo deep underground. After its sheriff breaks a cardinal rule and residents die mysteriously, engineer Juliette starts to uncover shocking secrets and the truth about the silo.
Seven strangers from different walks of life - people who would never normally interact - are forced to work together to renovate a derelict community centre. They resent the menial physical labour and they resent each other. But when one of their number gets dragged into a dangerous world of organised crime, they unite in ways none of them thought possible.