Who is Ulysses Moore really? Jason, Julia and Rick are about to find out. But the treacherous Oblivia and Manfred, who survived another fall from a cliff, are also about to realize their dream: they will enter the Argo villa and go through the Door of Time. To stop them, the guys need to find Black Vulcan, an old friend of Ulysses who drove trains in Kilmore Cove, and take possession of the First Key. A new journey awaits them. This time in the twelfth century, in the Garden of Eternal Youth. Here is the fifth part of the diary of the legendary Ulysses Moore.