An astounding guest makes House an offer he can't deny by allowing him the chance to help the Princeton Plainsboro group treat a special patient to spare the life of an organ beneficiary being directed by Wilson. In spite of the fact that House ends up back on natural ground, he rapidly understands that much has changed since he left, and he is compelled to take a shot at the case with brilliant yet shy inhabitant Dr. Chi Park. After a few uncertain medicines and with time running out, House and Dr. Park are left with one final choice to look at the patient's clinical history ...