Mayans, Vampires And Supermen, launches FBI agent Lili Foxworthy and her actor husband Peter von Rabenhorst, into three more major case files. Peter and Lili visit the Yucatan peninsula for research into an upcoming play, End Game -- The Mayan Prophecy. Thinking that England will offer a peaceful retreat after that almost apocalyptic vacation, they jet off to England and meet an Ancient Roman vampire called Gaius Quatremain. After that they go to Germany and meet a charismatic Interpol agent called Dieter Wolf and help with a case involving exploding people.