Mia Montrose‚ archaeological linguist‚ has discovered that the Black Madonna is a code used by secret societies throughout time for the lost key to an ancient power source: the Sphere of Amenti.
Kali‚ inter-dimensional Queen of the Anunnaki -- now fully merged with the youngest Dragon Queen‚ Tamar Devere -- has less than a year to rehabilitate her Fallen kindred who desire inter-galactic domination.
Ashlee Granville-Devere‚ and the Dragon Queens must pool their talents to open the twelve Stations of the Signet Grid and unlock the Halls of Amenti lest the Fallen succeed in using time-travel technologies to destroy humanity.
From the ancient past to the distant future‚ from Montsègur to the way-stations of the universe‚ from the Underworld of the Kali Rift to the Otherworld of the Ranna Time Flow -- the inter-time war must be won for the sake of the future.