You can't militarize space. This one rule has led to decades of peaceful development of space programs worldwide. However, increasing resource scarcity and a changing climate on Earth's surface is causing some interested parties to militarize, namely India, the North American Union, and the Sinese Federation. The discovery of a strange artifact by Dr. Alayna Wong precipitates a crisis. What appears to be a hitherto undiscovered comet is soon revealed to be an alien structure on a cometary trajectory toward the sun. Now there is a race between countries to see who can study and control the artifact dubbed the "Solar Express" before it perhaps destroys itself.