In the late 21st century, planet Earth is suffering. Deep under Stonehenge lies a giant crystal - our world's Sentinel, which regulates the conditions for life. Throughtout the universe are many such Sentinels, each relaying information in the cosmic network of stability. But the relay point for ours is malfunctioning. This will have catastrophic results, as the Sentinel loses control, creating tornadoes, earthquakes, volcanoes - even the ozone layer will dissipate. In the next decade, the Earth will cease to support life of any description. The Sentinel is aware of its plight, and reaches out to archaeologist Professor Caldeon, who in turn convinces former UN advisor Jason Havlin something must be done. Together they form a team who will explore both the Earth and the Universe in an array of hi-tech vehicles, battling natural disasters, and hoping against hope they can save the planet...