 The trail takes the three characters to (among others) a Cambridge library to research Isaac Newton's involvement in attempting to unlock the Loculus and to Rennes-le-Château and its Tour Magdala.They discover that the Loculus is related to Christian eschatology and has been hidden on Patmos, writing-place of the "Book of Revelation".Father Connolly stays behind in London as backup while Mira and Jake go to Patmos and find the Loculus hidden in a crypt beneath a Greek Orthodox Church and former temple to Mary Magdalene as Aphrodite.