Third in a series after Michael's Secret and No Secrets, Secrets Lie Still follows life at Highfield, an estate on Prince Edward Island beginning in September of 1939. Well aware of the growth of the Nazi war machine in Germany and its threats to the UK, a long-time senior strategist in Britain's Secret Intelligence Service, Rear Admiral (Ret.) Sir Richard Moncrieff, evacuated his wife and daughter to Highfield from Suffolk, England, in 1938. Sir Richard plans to continue his work from Highfield if German air strikes reach his SIS offices in London. When Germany attacks Poland on September 3, 1939, the world is plunged into war once again. While Sir Richard's two sons serve the Royal Navy at sea under constant peril of U-boat attacks, the war finds its way to Highfield in a covert attack that threatens the lives of his wife, their expectant daughter, and her husband, Michael Moreland, a SIS operative and Highfield's original superintendent. Amid all the perils that war brings, secrets still find ways to endanger lives and relationships among Highfield's denizens and friends. While war menaces from without, some discover that secrets threatening their peace lie within.