On the threshold of the twenty-first century, information moves instantly between two points without wires or networks Any moment of the past can be actualised and a group of historians can enter, literally, life in fourteenth-century France The historians are employed by a tech billionaire-genius He plans a theme park featuring artifacts from a lost world revived via cutting-edge science The project's chief historian sends a distress call to 1999 from 1357, but the risks are huge