After her father's death, twenty-two-year-old Claire becomes an invisible dependent in New York's wealthy Williams family. To repay debt and preserve her music dream, her stepmother pressures her to please stepbrother Derek at his birthday. The pair cross a boundary before recognizing each other; Claire flees when she learns the truth and is expelled, only to receive a job at Derek's entertainment company. As her boss he continues to test and pursue her, pulling them into a secret relationship spanning the same family and workplace. Discovery by their stepmother, Derek's political fiancée, and the patriarch triggers a battle over inheritance, reputation, consent, and their step-sibling status.
