Addie, a 19-year-old college student, is admitted to Princeton Plainsboro after coughing up a mouthful of blood during karate class. Before treating the patient, Foreman unapologetically informs the rest of the team that he is resigning, but will not say why. House strongly believes an infection is to blame for Addie's bleeding, even though her symptoms indicate otherwise. When Addie's lungs suddenly fill with fluid, the team believes that cancer or toxins could be an underlying cause, but House refuses to stray from his initial infection diagnosis. As Addie's condition worsens, House suggests a risky life-or-death treatment to confirm his suspected diagnosis, leaving the team wondering whether he cares more about making a diagnosis than he does about saving Addie's life. Meanwhile, House takes a special interest in a young, attractive nutritionist named Honey (guest star Piper Perabo), who accompanied her boyfriend to the clinic for treatment. Knowing he will have a position open soon on his team, House has Honey fill out an employment application and sees to it they meet again under more casual circumstances.

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