When Rena and her family arrive in Colonia Le Baron, a secluded polygamist Mormon settlement in Mexico, they are commanded to relinquish all their earthly possessions and devote themselves to the doctrines of the LeBaron brothers, Ervil and Joel. However, as the brothers’ insatiable thirst for power ignites growing discord, the community fractures, and Rena’s family aligns with Ervil.