The Dreef was a hive-mind, composed of trillions of virus-sized units which infected intelligent beings like a disease, taking over their minds.  It was on its way to conquer the entire galaxy – until those with still-free minds fought back, using a weapon so powerful that it wrought havoc with the Well World – the ancient planet sized super-computer that the vanished super-race the Markovians had built to maintain the form of their entire universe. There was one last Markovian left who could restore the control of time and space – last seen in human form and going by the name of Nathan Brazil.  But no-one knows where he is in the immensity of the galaxy – or if he’s even still in human form.  The task of finding Nathan falls to Mavra Chang, who has done the impossible over and over again.