The year is 2258, ten years after the destruction of Earth by the Minbari fleet. The last refuge of Humanity is a devastated colony on the planet Proxima-3. President Mary Crane is the head of the Resistance Government. The remnants of the Earth Military continue to fight against the Minbari using raiding tactics. Relations with Narn allies are far from ideal. The last hope of Humanity is one single ship and one single person. This ship is Babylon, this man is its captain. John Sheridan.

In this timeline, Babylon 4 was never built. So where did Epsilon 3 get it from? Apparently it's traveling back in time? And who is that hanging out there in the blue spacesuit?