Katherine inherits an ivory lighthouse and an antique necklace upon her grandmothers death. By chance, the lighthouse is recognised by the wrong people, as the Lighthouse of Paracelsus; a 600 year old myth that could unlock the secrets of the Voynich Manuscript. Narrowly escaping a group of individuals intent on getting the lighthouse at any cost, Katherine is rescued by Sebastian LeFoucon a French DGSE Agent. Believing they will be more secure on home ground Sebastian returns to Paris with Katherine, putting her under the protection of the DGSE. However, as they discover, no where is safe. Sebastian and Katherine find themselves engaged in a complex web of intrigue, politics, greed and legends. In order to survive they will need to decode the mystery surrounding the lighthouse as well as keep one step ahead of the people after them who will not stop at any cost.