New York City resident Diana Sullivan, a pretentious writer for Cosmopolitan magazine, is working on a series of articles about family. To keep an eye on her, her mid-teen daughter Grace Sullivan is invited to accompany her on a research trip to Louisiana's bayou region, where their family branch resides. The family, led by the patriarch Joe and his young widow Ruth Sullivan, has been isolated and deeply affected by the encroachment of oil companies. Ruth, who pretends Joe is still alive and rules her household with an iron fist, views anything related to the city with suspicion. Despite the challenges, Diana and Grace manage to meet their Louisiana relatives, but Ruth's strict demeanor and distrust of their urban origins create a tense and awkward atmosphere. As they navigate this unfamiliar world, the mother-daughter pair struggles to connect with their distant family, while Ruth's rigid lifestyle and unresolved grief further complicate the encounter.