Dr. Gregory House, a drug-addicted, unconventional, misanthropic medical genius, leads a team of diagnosticians at the fictional Princeton–Plainsboro Teaching Hospital in New Jersey.
An ailing man suffers from blackouts and sleepwalks, leading the team to wonder if his sleepwalking is a symptom, or how the man is becoming exposed to something else. When the man's daughter grows ill as well, the team must provide a diagnosis before both die. Meanwhile, Cuddy adopts a newborn but when the birth mother displays a rash, she has to make a decision between putting the mother or daughter at risk.