Olivia Denis discovers her father kneeling over the body of a man who supposedly drowned in the Channel years before. Scotland Yard suspects her father of the murder, but certain of his innocence, Olivia can’t let her maddening, disapproving father hang. Against her father’s wishes, Olivia supports a counter-espionage mission to prove his innocence. Soon she finds herself tracking a French assassin whose deadly assignments could tip the balance of power against Britain. Can Olivia catch the assassin and identify the location of a nest of traitors before they stop her...permanently?