Dr. Carter must attend a charity event hosted by his grandfather and cajoles Abby into filling in as his date at the last minute while Dr. Kovac treats an ailing Bishop Stewart and a 16-year-old in need of a third heart transplant who both insist on treatment that could threaten their lives. Also, Dr. Malucci is surprised by a patient's reaction to some HIV test results, and most of the staff -- especially Dr. Romano -- takes notice of Dr. Greene's new and aggressive post-surgery attitude.