Talia's old Psi Corps instructor, the victim of a secret experiment, is the target of a manhunt involving the Psi-Cops. Catherine wants to survey a promising planet for possible mining, but G'Kar warns her to stay away.
Jason Ironheart, Psi-Corps Level 10, has stolen a transport vessel but is being pursued. His pursuers order him to stop, but he ignores them. Suddenly, there is a strong explosion, and only one ship emerges: Ironheart's ship, headed toward Babylon 5.
On Babylon 5, Sinclair and Catherine Sakai, his girlfriend, have just woken up. Catherine explains that she's working on finalizing a contract with Universal Terraform, an important corporation from Earth.
Meanwhile, Ironheart has arrived on Babylon 5.
Talia Winters is having a conversation with a businessman from Universal Terraform who wants to use her services in an upcoming negotiation. They enter an elevator (turbolift?) which Garibaldi is also currently using. The businessman asks what it's like to be a telepath; Winters responds that it's often difficult to block out the thoughts around her - while casual thoughts are simple to ignore, strong emotions can somehow break through whatever mental barriers she can set up. Suddenly, she turns around at Garibaldi (who has been experiencing his own "strong emotions" while staring at Winters) and elbows him in the stomach.
Elsewhere on the station, Bester and Kelsey, two Level-12 "Psi-Cops," have just come aboard Babylon 5. They telepathically "ask" a minor official to bring them to Sinclair.
Catherine Sakai is meeting with the businessman from Universal Terraform - the businessman who has brought Winters along. The businessman is concerned with the confidentiality of the planet which Catherine wishes to survey (because the planet, known as Sigma-957, may have some deposits of Quantium-40, a material important to the construction of jumpgates) - and so, following orders from his superiors, he asks Sakai to promise not to mention the planet to anyone - not even Sinclair. He has brought Winters along to verify that Sakai is telling the truth when she says she will not tell anyone about the planet - and, indeed, Winters does confirm this. The businessman also notes that, since the planet in question is in a contested region of space, they need the consent of one other major party - in this case, G'Kar, representing the Narn, will give that consent and will collaborate concerning Sigma-957.
Bester and Kelsey arrive at Sinclair's office, and begin to have a telepathic conversation with him. Sinclair gets quite annoyed, telling them that he doesn't like people "rummaging around in my head." He questions them, asking about the rules governing such use of telepathic abilities. They tell him that they are psi-cops, and because of their important responsibilities, they are given a wider latitude than other telepaths. They tell Sinclair that they are on a mission to track down a rogue telepath - one who may be putting the Earth Alliance's military structure at tremendous risk. Sinclair is hesitant to offer assistance, but they insist that he hold a meeting with the station's resident telepath (Winters), as well as security and command personnel.
Ironheart is standing in his newly-rented quarters when he suddenly appears to get a terrible headache. He clutches his head, but is apparently unable to make the pain go away. Suddenly, the entire room starts shaking, almost as if to reflect his pain.
The meeting that Bester and Kelsey requested has begun. Winters, Ivanova, Garibaldi, and Sinclair are present. Bester asks Winters if she knows (or ever knew) Ironheart; she replies that Ironheart was her instructor in the Psi-Corps Training Academy. Kelsey explains that one year before, Ironheart had been reassigned to work on a covert operation with Earth Force Military Intelligence. Bester and Kelsey refuse, however, to explain the nature of his covert operation. They only say that what is in Ironheart's brain would compromise Earth Force's position and possibly lead to the deaths of covert operatives on other worlds; they believe that Ironheart wishes to sell this information to alien governments. They refuse to give any other information (particularly, they refuse to tell Sinclair what type of danger Ironheart poses to the station); they only Sinclair to find and bring back Ironheart ("Alive if possible; dead if necessary") - "We'll do the rest." The Psi-Cops asks Winters if she has had any contact with Ironheart; she replies that, since she left the academy, they have corresponded only through letters. The Psi-Cops, however, do not believe her - they order her to submit to a mental scan so that they can be sure of what she's saying. She cringes at the possibility, for mental scans can be quite painful - nonetheless, she is forced to comply. The scan is performed, and the Psi-Cops are surprised to find that Winters has been speaking the truth. "Surprising," says Kelsey, "given their prior involvement." The Psi-Cops then leave, ordering everyone (but especially Winters) not to speak with or approach Ironheart if he is found on the station.
A short time after Winters has left the meeting, Ironheart approaches her in dark corridor. She attempts to leave quickly, explaining that she was ordered not to see him. He says that he is aware of the Psi-Cops (and also that he was aware of their scan of her mind - which is why he waited until after the scan to contact her), and promises to simply explain the whole situation to Winters if she'll give him the chance.
Sakai, meanwhile, is quite annoyed at G'Kar's involvement with the mission at Sigma-957. He explains that he has involved himself only in order to protect Sakai - "Sigma-957 is not a healthy place. Strange things happen there." Sakai, however, doesn't believe him, and explains that she thinks he and the Narn just want Sigma-957 for themselves. He denies her suspicions, telling her that she shouldn't believe everything she's heard about G'Kar - "No one here is exactly what he appears," says G'Kar. "Not Mollari, Delenn, not Sinclair, and not me. My warning is sincere; ignore it at your own peril." She still, however, doesn't believe him, saying that she will, if necessary, "go over his head" and communicate with her own contacts in the Narn regime.