'The Earth of our distant future has become a strange and frightening place. Now, thousands of years later, two off-worlder humans Anna and Joe, are sent back to this wild and unpopulated planet to try to begin human life all over again. And together with their babbling computer companions Og, Trog and Walter, they set off on a journey of hope.
'But what they discover is a world far more confusing, far more powerful, than they'd ever imagined. Rats that seem to reason for themselves? Creatures that communicate in ancient human codes? What is going on?'
Source: Publisher's blurb.