Patrick is a photographer whose once drug-addicted sister, Caroline, is a member of an isolated sober-living community in Mississippi. When his sister leaves the country to start a new utopian society in the jungle, he enlists two co-workers to shoot a documentary on their whereabouts. Based on detailed research of the infamous Jonestown massacre, The Sacrament is a thoroughly terrifying examination of modern religion, charismatic influence and the exploitation of power.