These are the journals of Yultant, an alien scholar and time traveler who has a long affiliation with Earth. He records the complex rise and fall of humanity through the eyes of alien visitors to Earth over thousands of years. He programmes the 'God Computer' to run simulations on Earth, by way of experiment, to see how various scenarios play out and assess how humanity is affected by these interventions. The plight of the aliens becomes inextricably linked due to unforeseen events on Earth, and the fate of Earth is impacted by the gradual death of Yultant’s own planet Rostral, and the need to evacuate in order to save their civilisation from extinction. Yultant becomes not only the judge, jury and executioner but ultimately the saviour of mankind as the mass migration eventually leads to the creation of a new paradise on many levels.