This movie is a prequell to the Babylon 5 series.
In it we find out about the Earth/Mimbari war, and its long reaching reprucussions!
We start out in the year 2278, and Luc and Lyssa venturing into the throne room
of the Emporer of Centauri, Londo Mollari. As he confronts the two children,
he starts the tale of the Earth/Mimbari war!
He tells of how Captain John Sheridan's heroics in the war brought him to
prominance, of the great mistake that brought about the death and distruction
of many Mimbari and Humans, and of the discoveries made during the war that
finally brought it to an end.