Captain Lochley arrives just as preparations are underway for Sheridan's swearing in ceremony as the President of the newly formed Interstellar Alliance. Telepaths arrive seeking a sanctuary while they search for a home world.
It is the Brakiri Day of the Dead. They purchase a large section of the station for their holiday. That night everyone in that sector meets with people who have passed away. Most of the inhabitants of the sector are happy to see their loved ones, but Lennier's encounter leaves him with troubling news about his future.
In the year 2776, the now-aged Centauri Emperor Londo Mollari recalls the never-before-revealed events of the cataclysmic Earth/Minbari War, which almost destroyed the human race ... and led to the creation of Babylon 5.
A day in the life of Alfred Bester, who starts his day in Psi Corps HQ, where he is well liked and respected. He gets an assignment to track down a rogue telepath, two recruits accompany him. They follow the telepath's trail to Babylon 5, where he isn't as popular.
Sheridan finally discovers why Delenn had Lennier assigned to the White Star Fleet, and orders his ship to return. But Lennier takes his fighter and continues his mission, where he finally gets the information the Alliance needs. Lyta contacts G'Kar and reminds him of the offer he made to her in "The Gathering." She's willing to help the Narn in exchange for money to find a home world for telepaths.
The Alliance show the member worlds evidence of the Centauri actions, while Londo and Vir are in their room with copies of the evidence. Eventually they're let into the meeting, where they all see the evidence Lennier gathered. Sheridan comes up with a plan to peacefully enforce a blockade, but Garibaldi's issues jeopardize his plans.
Londo and G'Kar return to Centauri Prime to figure out who in the government started the attacks, and are put in jail. G'Kar eventually figures a way for Londo to get out, and Londo tries to gather support. Garibaldi learns of two member worlds's plans to attack Centauri Prime. He informs Sheridan, who rushes off to try and stop the attack. Delenn and Lennier head back to Minbar to convince the council to build new ships, but are attacked in hyperspace. Lyta and Franklin find out what's been controlling the Centauri attack fleet.
Centauri Prime has been attacked, thousands have died. Londo finds out the truth, who masterminded the war, and why they allowed the attack on Centauri Prime to happen. Londo becomes Emperor, and has to act hostile to those he once called "friend."
G'Kar returns to the station to find he has become a religious icon. Sheridan confronts Garibaldi about his drinking problems. Lyta is taken into custody for planning attacks on Psi Corps. Delenn collapses, and they find out she's pregnant.
Garibaldi and Lise are going to get married, he'll run her late husband's company. An assassin is hired to kill Lise. Zack has a plan to smoke him out, but another person wants G'Kar dead as well. Both attacks are prevented. Garibaldi deals with the people who ordered the hit on Lise. G'Kar and Lyta leave the station.
Garibaldi forms a new Board of Directors for his company. Ta'Lon becomes the new Narn ambassador. Sheridan and Delenn leave for Mimbar. An accident on board their White Star ship creates doubt/hesitation for Lennier, who fails to act appropriately. He leaves the ship, and tells Delenn he'll come back one day to atone for what he's done. Sheridan and Delenn are greeted by Londo on Mimbar who has a gift for them.
20 years after he visited Z'Ha'Dum, Sheridan knows his time is short and gathers his old comrades together. Afterwards he takes personalized White Star to Babylon 5 where it's going to be decommissioned shortly. The final leg of his journey takes him to Coriana 6 where they ended the Shadow War, and meets with one last person. The old command staff gather on Babylon 5 to watch its decommissioning.