Wilson arrives at work a bit late to find House already in his office. He needs Wilson's help to figure out why his new patient's daughter's terminal cancer went away and also wants to know why Wilson is late for work in the first place. Wilson's excuses fall flat as House knows way too much about him and his schedule so he knows that Wilson's tires are too new to have a flat and there are no construction sites between Wilson's house and PPTH that could have put debris in the road for Wilson to run over, thus puncturing his tire. Wilson isn't as creeped out as he probably should be and says the girl could have recovered because the cancer was a misdiagnosis in the first place (very possible if it was diagnosed by PPTH's only cancer doctor) or maybe it was just a "spontaneous remission."
Wilson finally comes clean with House as to what delayed him on his way to work: he was buying an engagement ring. On the way to work? Are jewelry stores even open that early? How weird. And not very romantic. House examines the ring and tells Wilson that his idea to propose to Sam at the wedding is the second stupidest thing he's heard today, especially since there's no need to buy a new engagement ring when she probably still has the one Wilson gave the first time they were engaged. Wilson deflects by asking House about his love life or lack thereof with Cuddy, recommending that House just apologize to her even though he doesn't mean it. Instead of taking that advice, House uses it to think of a way he can get Cuddy to give in: by catching her lying to him and hoping two wrongs will make a right or something.