In 1991 a group of countercultural visionaries built an enormous replica of earth’s ecosystem called Biosphere 2. When eight ‘biospherians’ lived sealed inside, they faced ecological calamities and cult accusations.

Could a group of dreamers mimicking the world’s ecosystem change our relation to the planet’s future? Matt Wolf’s intriguing documentary debunks the myths around the Biosphere 2 project, laying bare the shortcomings of this scientific commune, while doing justice to their utopian vision.