A series of bombings threatens the station, and Ivanova calls on some unusual investigators to help solve the mystery.
Still in Docking, Zack's day improves further when the arrival of a chapter of monks interrupts his attempts to respond to the explosion. In Downbelow, the heavy damage and confusion mystify the crew. Although Garibaldi determines that it was a bomb, he can't find anything worth blowing up.
A staff meeting clarifies that these blasts are aimed at people, not installations, and are being effective in their apparent purpose of spreading chaos and terror. Sheridan orders martial law and the bomber watches its imposition with satisfaction. While Lennier hovers in a coma, G'Kar rails at Garibaldi about the Centauri responsibility for the explosions and Londo insists to the captain and commander that the Narn are widening the range of their terror tactics. But the truth is that there is no sense to the attacks, and no one is claiming responsibility.
Meanwhile security determines from a molecular trace of the bomb materials that they were stolen from an ice mine on Beta 7, and that the bomber seems to have struck before on Proxima 3. Garibaldi balks when Sheridan orders a full investigation of all traffic from there to B5 cross checked against possible gloaters filmed by security cameras after the blasts. Ivanova has the bright idea of putting the new engineering monks to use.
Londo promises the unconscious Lennier to return, and departs on an errand. Upon finding the transport tube occupied by a smoldering G'Kar, at first he refuses to enter, but an instant later he leaps inside to escape a rush of flame from a bomb blast further down the corridor. Two hours later he rouses to find himself trapped in the damaged tube under the pitiless eyes of the former Narn ambassador. Londo proposes a plan of escape before the flames outside suffocate them, but with exquisite mirth G'Kar refuses. Though he'd like to live he would be delighted to watch Mollari die.
When the battered and damaged Lennier finally comes around, he explains that he saved Mollari's life at the risk of his own because "all life is sacred. But when the object of your actions does not share that belief... ahh, I fear that I have served the present by sacrificing the future."
In the "last of the debris" from the last explosion on board, a rescue team comes upon the two nearly asphyxiated enemies in the transport tube. They curse each other with familiarity.
"You are insane!"
"That is why we'll win," G'Kar gasps.
"Go be the ambassador to Babylon 5 they said. It will be an easy position. I hate my life."