Politics is a ruthless business, even more so for a woman. When headteacher Kirsty's local MP resigns after a sex scandal, she's set on running in the by-election to replace him. She seems the ideal Labour candidate – hard-working, ambitious and with excellent working-class credentials. Only her husband Rick is unconvinced.When he fails to dissuade her from standing, Rick sets out to influence Kirsty's campaign to his own advantage. Kirsty battles on in the spotlight as the domestic and the political start to collide – until a revelation from the past threatens to derail the whole operation.