Having been elected as Prime Minister, Ros realises there has been a terrible mistake. She knows nothing about politics, so how can she possibly run the country? Even her husband, Ian, thinks she's proved her point and should now step down. While the Queen tries to persuade Ros to stay, her supporters, Miranda and Catherine, try to put together a Cabinet without knowing anything about its potential members. Ros' first few days in office are a whirlwind of meetings and decisions which leave her family feeling neglected. When Ros has to call the wives of British soldiers who have been murdered in the line of duty, she realises for the first time how tough this job is really going to be.