In 1972, while her idol, Mark Spitz, is in Germany competing in the Olympics, fifteen-year-old Winston, her Nanny, and her crush, Steve, head to Las Vegas in Steve's parents' motorhome to reconnect with Winston's mother, who left ten years before to become a star.

Living with their mother who earns money as a prostitute, two sisters take care of each other and when the older one attempts suicide, the younger one tries to uncover the reason.