It is the year 2044 on Earth. At the Farside observatory complex on the Moon, a startling astronomical discovery has been made. A survey for pulsars has found an x-ray source in a region of space where none has been detected before. Upon further investigation, they find that this x-ray source is just outside of the Solar System. The astronomers are paralyzed by what they have found knowing what its disastrous ramifications might be.A neutron star is approaching the Solar System. It appeared out of a small dust cloud that was shielding its approach. Armageddon has arrived; the star is on a trajectory that will take it through the center of the Solar System. Life on Earth will not survive its passing.The only hope for survival will be on the massive Star One space station at the Earth-Moon Lagrange point or possibly in Tycho City deep beneath the Moon's surface. It will be a race against time to save a fraction of the Earth's frightened population. A power struggle will erupt on Earth over who is to survive. On Star One and at Tycho City they prepare for the worst, unfortunately, the threat from Earth might be just as dangerous as the approaching neutron star.