What started as a suspicious explosion in a picturesque Parisian neighborhood could end in revelations that would shatter the beliefs of millions. American lawyer Lang Reilly is determined to find the real cause of the blast that killed his sister. But his investigation will lead him into the darkest corners of history and religion. And it may cost him his life. Lang’s search for the truth begins with a painting his sister bought just before she died.

Could there be something about the painting itself that made someone want to kill her? Every mysterious step of the way, Lang unearths still more questions, more hidden secrets and more danger, until finally he arrives at the heart of a centuries-old secret order that will stop at nothing to protect what is theirs.