House stops by Nadia's room to figure out what caused her respiratory distress. While Chase and Martha assume it's another symptom of her mystery disease, House spots hives on Nadia's legs and guesses they're looking at an allergic reaction. Chase doesn't see how, since Nadia is on steroids right now. House says a really bad allergic reaction would show up even with the steroids. His guess? Nadia is allergic to the dialysis. That's bad news for Nadia, since she kind of needs the dialysis for her failing kidneys.
In the hallway, Martha asks what they should do next. "Look for another case," Chase shrugs, figuring that Nadia is going to die from kidney failure before they can figure out what's wrong with her and treat it. Martha points out that Nadia can get a donor kidney from a family member. Apparently the only family member she has is Elena, and she's kind of mad at her right now and probably not in a kidney-donating mood. Martha says she might have been if they hadn't interfered and made things worse between the sisters. Chase doubts it, sharing with House and Martha about how Nadia keeps score of the good and bad things people have done for her, and used it to determine that her own sister doesn't deserve her affection. Chase sounds disgusted with Nadia for this, but House clearly admires Nadia's talents as he says that she's probably right about Elena and that her memory gives her a "pure and objective view" free of agendas or emotions. Um, just because Nadia's memory is perfect doesn't mean it isn't subjective. People are subjective, and they see things subjectively. House says that, unlike Nadia, Elena has plenty of agendas and emotions, so Martha can go work off some of her guilt by exploiting them to get Nadia a new slightly used kidney. Martha doesn't want to, saying she's not "good at that type of thing." That, and she's scared Elena will call her a bitch again. House doesn't care.