Mercia Masson dressed stylishly and loved to host a party. She was a journalist in an era when there were few female journalists, she always wanted to be in the thick of things, and she knew people in very high places. She also led a dangerous double life. This is the remarkable story of an ASIO agent who was hung out to dry. She was exposed at a royal commission that was partly intended to undermine public confidence in the ALP and its leader, Doc Evatt. Written in association with her daughter Cindy, this story brings to life a determined woman at the centre of dramatic events in Australian politics during the Cold War.