À Shaker Heights, banlieue riche et tranquille de Cleveland, tout est soigneusement planifié pour le bonheur des résidents. Rien ne dépasse, rien ne déborde, à l'image de l'existence parfaitement réglée d'Elena Richardson, femme au foyer exemplaire. Lorsque Mia Warren, une mère célibataire et bohème, vient s'installer dans cette bulle idyllique avec sa fille Pearl, les relations avec la famille Richardson sont d'abord chaleureuses. Mais peu à peu, leur présence commence à mettre en péril l'entente qui règne entre les voisins. Et la tension monte dangereusement à Shaker Heights.

In Shaker Heights, a placid, progressive suburb of Cleveland, everything is meticulously planned - from the layout of the winding roads, to the colours of the houses, to the successful lives its residents will go on to lead. And no one embodies this spirit more than Elena Richardson, whose guiding principle is playing by the rules. Enter Mia Warren - an enigmatic artist and single mother- who arrives in this idyllic bubble with her teenage daughter Pearl, and rents a house from the Richardsons. Soon Mia and Pearl become more than just tenants: all four Richardson children are drawn to the mother-daughter pair. But Mia carries with her a mysterious past, and a disregard for the rules that threatens to upend this carefully ordered community. When old family friends attempt to adopt a Chinese-American baby, a custody battle erupts that dramatically divides the town - and puts Mia and Elena on opposing sides. Suspicious of Mia and her motives, Elena is determined to uncover the secrets in Mia's past. But her obsession will come at an unexpected and devastating cost...