In 1914, her family moved to Australia and settled at North Sydney. Shortly thereafter, her father, Charles Augustus Wake, returned to New Zealand and her mother, Ella Wake (née Rosieur; 1874–1968) raised the children. In Sydney, Wake attended the North Sydney Household Arts (Home Science) School. At the age of 16, she ran away from home and worked as a nurse. With £200 that she had inherited from an aunt, she journeyed to New York City, then London where she trained herself as a journalist. In the 1930s, she worked in Paris and later for Hearst newspapers as a European correspondent. She witnessed the rise of Adolf Hitler and the Nazi movement and "saw roving Nazi gangs randomly beating Jewish men and women in the streets" of Vienna. In 1937, Wake met wealthy French industrialist Henri Edmond Fiocca (1898–1943), whom she married on 30 November 1939. She was living in Marseille, France when Germany invaded. During the war in France, Wake served as an ambulance driver. After the fall of France in 1940, she joined the escape network of Captain Ian Garrow, which became the Pat O'Leary Line. In reference to Wake's ability to elude capture, the Gestapo called her the "White Mouse". The Resistance exercised caution with her missions; her life was in constant danger, with the Gestapo tapping her telephone and intercepting her mail. In November 1942, Wehrmacht troops occupied Vichy France after the Allies' Operation Torch had started. This gave the Germans and the Gestapo unrestricted access to all parts of Vichy France and made life more dangerous for Wake. When the network was betrayed that same year she decided to flee France. Her husband, Henri Fiocca, stayed behind. He later was captured, tortured, and executed by the Gestapo. Wake described her tactics: "A little powder and a little drink on the way, and I'd pass their (German) posts and wink and say, 'Do you want to search me?' God, what a flirtatious little bastard I was." In early 1943, in the process of getting out of France, Wake was picked up with a whole trainload of people and was arrested in Toulouse, but was released four days later. The head of the O'Leary Line, Albert Guérisse, managed to have her released by claiming she was his mistress and was trying to conceal her infidelity to her husband (all of which was untrue).