England, 1921. Social pariah Millie Woodridge is obliged to obtain employment as a companion for an aging actress after her father is unjustly executed for espionage. Then she meets handsome adventurer James Haxby and is drawn into the dark, but thrilling, world of espionage. Unsure who to trust, Millie joins James in tracking down a callous murderer and uncovering the truth about her father.