A mysterious man comes to Babylon 5 dressed in chainmail and armed with a sword. His name? King Arthur - Son of Uther Pendragon, come to help when he is needed most.

The Earth military encounters an alien race called the Minbari. Through a series of accidents and misunderstandings, a war breaks out that nearly results in the death of every human on Earth. The war and its aftermath provide the background for the TV series ""Babylon 5.""