This episode is aptly named because it not only deals with the legacy left by the Earth-Minbari war, but also that left by Psi Corp in the life of Susan Ivanova.
It opens with a Minbari war cruiser arriving at Babylon 5, as part of a tour to bring the body of the military leader Shai Alyt Branmer to be viewed by all Minbari - which includes rites to be conducted on the station. To the human crew of the station, mostly veterans of the war who fought against Branmer's forces, it seems like posturing so they're a little twitchy when the ship approaches with gun ports open. Commander Sinclair asks the captain of the ship to explain and is bluntly told no. At this point Delenn arrives at a run, to apologise for the misunderstanding. It is, she explains, merely a show of respect for the body they carry, and no different to Earth traditions for military funerals. Sinclair is barely mollified by this, and Delenn's assurance that the gun ports will be closed which the ship is parked alongside. It's not until the TV movie In the Beginning, which aired between seasons 4 and 5, it will become apparent that this is the exact misunderstanding which sparked the war.
Branmer's executive officer Neroon is in charge of the cortege, and feels much the same way about the human crew as they do about him. He refuses to let station security guard the body as it lays in state, and hands Sinclair a list of requirements. It takes Delenn's intervention again - "It's been my experience that discussions of old battles only interest historians" - to talk them down from their posturing, and it's interesting that she chooses Sinclair to ask what he thinks. It not only avoids the appearance of siding with her own people, it also puts Neroon in his place. And of course it's been seen throughout that Sinclair is a diplomat at his core. He takes the olive branch.
Neroon's lack of faith in thee human security crew makes it all the more galling for him when during the ceremony the following day it's revealed Bramner's body has gone missing.
Garibaldi investigates, searching the public areas and even pumping the stomachs of the resident Pak'ma'ra, a race of carrion eaters, before starting to look in the hidden places such as between the hulls. None of it is good enough for Neroon, who threatens to take the station apart with his warship. He even searches Sinclair's quarters without permission, leading to a fight before they're separated and Neroon informed that the quarters have already been searched with Delenn as a witness.
The answer as to where Branmer's body is, is answered by an unexpected source: the B plot.
At the beginning of the episode, as Neroon's ship arrives, a teenaged girl collapses while trying to steal food. Resident telepath Talia Winters recognises the signs of a mind burst, where a latent telepath's talents suddenly manifest at puberty. The girl, Alisa, is living homeless on the station after the death of her father. Station records reveal he died in an accident the previous year, which raises some questions about the quality of their civil infrastructure if no one went looking for his orphaned daughter at the time.
Talia wants to ship Alisa to Earth to be with Psi Corps, but Ivanova will do whatever she can to stop it happening. She tells Alisa the story of her mother - the bits that Alisa doesn't inadvertently read - and how as a telepath she was given the choice to join Psi Corp and abandon her family, go to prison, or take injections to suppress the ability. She chose the latter, and the injections slowly killed her. Ivanova wants Alisa to understand what Psi Corps is before she joins them.
She's not the only one with an interest in finding another place for Alisa. Talia and Ivanova interrupt Na'Toth trying to negotiate for her to come to the Narn Homeworld where she'll be paid handsomely for "a small sample of blood and tissue twice a month" so the Narn can create their own telepaths. During the discussion Alisa accidentally peeks into Na'Toth's thoughts and doesn't like what she finds there. This gives Ivanova another idea, and she takes Alisa to see Delenn to discuss becoming a telepath among the Minbari. Alisa is unimpressed by what they offer - instead of the riches promised by Na'Toth, Minbari telepaths aren't rewarded except by the work. They're deeply respected, and as such clothed and fed by wider society, and otherwise left to get on with their calling. It's not this that scares Alisa off though, it's the accidental peek she has that Delenn knows something about a missing dead body.
Just as Sinclair and Neroon are being dragged apart, Alisa's taken to see Garibaldi and Sinclair to explain what she knows. They find Delenn in the act of handing over Branmer's cremated remains to be quietly taken home to Minbar and scattered in space. This was his last wish, which Neroon and his clan the Star Riders ignored. Branmer was originally Religious Caste, and was called to the Warrior Caste during the war but was always a priest at heart. Delenn agrees to tell Neroon the truth to diffuse the difficult situation her subterfuge has left the station in, but she will do it her way to avoid furthering the rift between the Religious and Warrior Castes that was cause by the Religious Caste's order to surrender in the Earth-Minbari War.
Delenn's way involves castigating Neroon for his clan's action and, when he refuses to back down, bringing down the weight of the Grey Council. He will do as he's told or the dishonor of ignoring Branmer's wishes will cause the Star Riders to be destroyed. Given the rift she spoke of earlier, it's unlikely she does actually speak for the whole of the Grey Council, but Neroon is in no position to argue. He agrees to support her story of the body being transformed in a religious mystery, and to her demand to apologise to Commander Sinclair.
The apology is as awkward as you'd expect between two men who dislike each other a great deal, but Sinclair is at least gracious. He offers to send a message to Minbar in testimony of the Shai Alyt's prowess as a warrior. Neroon is both surprised and grateful, and tells Sinclair "you talk like a Minbari" and quips "perhaps there was some small wisdom in letting your species survive." Sinclair replies "we like to think so", sharing the joke and surprising Neroon again. In the end they part with mutual respect and a desire to move beyond the war.
Also looking to the future is Alisa. Although it's not shown on screen, Delenn has apparently spoken to her again as she's scheduled to head to Minbar on Neroon's cruiser. Sinclair takes the opportunity to ask if she saw anything else strange in Delenn's mind, presumably hoping to find something to explain his abduction during the war. All Alisa can tell him is a word, chrysalis. Talia and Ivanova arrive to see her off, and agree to have coffee to make up for how heated their discussions got.
We never hear from Alisa again, although Minbari being Minbari it can be assumed they keep her busy with training. This episode leaves its own legacy, however, in the threads involving Neroon, Talia's and Ivanova's relationship, and the "chrysalis", which will all be picked up in later episodes.