In a perfect community based on rules, order, and conformity, a single mother named Mia and her daughter Pearl rent a house from the Richardsons. As the Richardson children become close to the mother-daughter pair, Elena Richardson begins to suspect the motives of this woman who goes against the grain, and who possesses a dark secret. And after family friends of the Richardsons enter into a fierce custody dispute over an adopted Chinese American child, pitting Mia and Elena against each other, Elena decides to investigate Mia's secrets with devastating effects.