As Britain prepares for an imminent invasion, the murder of a celebrated Arctic explorer leads to the discovery of a web of Nazi spies on the south coast.

July, 1939. Newlywed Olivia Denis Redmond plans to spend a peaceful honeymoon in the country before war rips her soldier husband away. But when she finds a dead body in the midst of a blackout, Olivia is drawn into the investigation.

Since the police inspector isn't interested in clues pointing to espionage and blackmail, Olivia must unlock secrets hidden for years in this idyllic village and face the wrath of an unseen enemy.

As danger stalks her, can Olivia expose a cunning killer before she becomes the next victim?