An unprecedented portrait of one of the most complex members of the British royal family, Princess Margaret. As younger sister of the Queen, Margaret was in a unique position and it's through her story that we can tell the history of the modern royal family. Was that particular accident of birth a blessing or a curse? The Queen had a clear, defined purpose, but what did Margaret have? In this revelatory series, we learn that Margaret pushed at the boundaries of royal tradition in a way the Queen herself could not, paving the way for Princess Diana, and the young royals today.