Lu faces the doctor that raped her when he needs surgery that can save his life. Peter goes out with a woman who has terminal diabetes.

A smallpox vaccine for a hospital worker leads to life-threatening complications for her child. Also, Andy helps a premature baby unknowingly save the life of her mother.

Andy and Lu put their heads together when each of their patients show signs of being poisoned. It appears their exposure to chemicals may turn out to have more to do with where they shop. Lu tries to mediate between an alcoholic and the daughter offering a piece of her liver for transplant.

Ben Sanderson wants to cut screening tests for newborns. A patient of Lu's thinks a patient of Andy's is a fugitive but doesn't believe it. Everyone worries if they will have jobs if Octavian Systems takes over Rittenhouse. Andy is asked to stay on a Rittenhouse, and fights for Dr. Jackson's job.

Nick is transferred to Manhatten General. Ben's HIV test has a positive result. Also, Ben hires his ex-wife to make up for the damage he caused to her career. Andy learns that her daughter Jesse's friend is addicted to cough syrup. Kayla Thorton, a new intern, is pushed into the hustle and bustle of the ER. She gets into trouble when she asks a girl if she is sexually active in front of her mother and things go terribly wrong.

Jesse gives her friend CPR to save her life after she loses consciousness due to consuming too much syrup. Andy feels responsible for the incident because Jesse's friend was in her care.

Kayla is frustrated when a patient refuses to let her treat her due to her race and her intern status. Andy refuses to treat her and insists that Kayla handles the patient. A complaint is filed against Andy because she refused to treat the patient. A new doctor at Rittenhouse must take over Milo's patients and replace him in the hospital.

Lana bets her pink feather pen that she'll sign up more people than a friend will for the Rittenhouse Breast Cancer Walk. She faces some difficulties, however, and goes to extreme measures to get people to sign up. Lu tells a teenaged patient that she is pregnant and she in turn tells Lu that Lu's son Marc is the father. In a shocking ending, the girl reveals a horrifying secret. Andy, meanwhile, takes action when Lizzy's friends receive ""fat letters"" and instead makes the school food healthier when Lizzy starts to severely diet.

Andy must face the questions of people opposed to her becoming Surgeon General while she struggles to get Senate confirmation. Lu's unique way of practicing medicine and their relationship challenge her chances. Kayla and Peter prepare for the next step in their relationship but struggle to find privacy. Lu reads something in a newspaper about Jonas that could change their relationship forever.

Lu meets Andy 's replacement, Dr. Dylan West, an obnoxious man she worked with when she was an intern as they struggle to save the lives of the many people involved in a train accident. Later, she discovers something shocking while talking to a bipolar patient. The president is in town and the Secret Service makes sure the hospital keeps plenty of B- blood (the president's rare blood type) on hand. Dylan tries to help a pregnant patient make the right decision about a potentially hazardous surgery. Meanwhile, Lu contemplates marrying Jonas while dealing with the obnoxious woman who caused Dr. Jackson to lose his job. Later, the unthinkable happens to Lu and she and those close to her struggle to save her life.