Sue Spears, an impoverished girl taken in by the wealthy Spears family as their lost daughter, faces harsh rejection and false accusations from her adoptive sister Ruby. Ruby accuses Sue of trying to kill her by pushing her into a pool and framing her for arson, escalating family conflict. Despite Sue’s protests, their foster father sides with Ruby, demanding Sue apologize and eventually disowning her from the family. As Ruby cements her control over the Spears household, Sue is left isolated and cast out, setting up a tense struggle over the family’s future and Sue’s place in it.