Mark and Elizabeth squabble after he disagrees with her treatment of his father. Carter gets in trouble when a patient that he had discharged for insurance reasons comes back into the hospital near death. Weaver is suspended after disobeying a direct order from Romano, regarding the care of a mentally challenged girl. Kovac and Corday are faced with a blitz of possible kidney receivers, but Luka has a problem with the one who gets it. Cleo and Benton endure Romano's ire for scribing a messy prescription that nearly kills a man; they later have sex on the stairs at her place. Chen faces some personal obstacles when treating a man who refuses to tell his daughter about his genetic condition.

Greene takes the day off to care for his dying father but ends up in the ER anyway where the older Greene is diagnosed with pneumonia. Carter is plagued with flashbacks from his attack and visits Samantha Sobricki in an attempt to gain some insight on why Paul might have gone off the handle. Carol and Luka spend a day on the town shopping for a used car, and are drawn into a kiss. Weaver returns from her suspension. Abby treats a young girl in need of a bone marrow transplant, but whose mother won't allow it out of spite for the father. Benton and Finch have breakfast with his sister, where Jackie tells Peter that Cleo is not serious about him.