The human race controls 200 planets throughout the galaxy. A navy is employed to keep order, using the Alderson drive to jump from planet to planet.
In a region of space far from Earth a small sub-light space craft is discovered moving away from an area of space known as the Mote in Gods eye. When the ship is recovered it is found that the sole occupant of the ship is dead. An expedition is launched to the Mote to make contact with this newly discovered race of beings.
What they encounter is an advanced civilization that seems peaceful and open to their visitors. But as time goes on it becomes clear that these creatures are hiding something. A secret so dangerous it could destroy the entire human empire.
If you like a good page turning adventure with a decent plot, look no further.