Dr. Shaun Murphy questions his decision to give the new residents autonomy when one of his intern's misdiagnosis of a patient has dire consequences. Meanwhile, Dr. Claire Browne, Dr. Alex Park and Dr. Jordan Allen treat a patient with a ruptured cyst affecting key functions of her brain. And elsewhere, Dr. Morgan Reznick and Park bond over failed relationships.

When a renowned surgeon comes to St. Bonaventure for treatment, the team’s enthusiasm is quickly overshadowed by the doctor’s behavior. After studying his case, Dr. Shaun Murphy sees a pattern he recognizes. Meanwhile, Shaun and Lea are forced to make a life-changing decision that will alter the course of their relationship.

Dr. Shaun Murphy must perform a risky surgery on a patient without electricity when the power suddenly goes out. Meanwhile Lim and Dr. Mateo Rendón Osma’s relationship deepens as they overcome difficulties during the surgery.

Dr. Shaun Murphy and the team treat a young girl whose father’s personal research complicates their treatment plans. Meanwhile, Dr. Park, Dr. Reznick and Dr. Lim’s patient refuses a life-saving lung transplant despite having a family donor.

Shaun, Asher and Powell treat a young patient on Halloween with a rare hereditary disease, sending them down an uncharted path. Meanwhile, Glassman and Shaun must overcome their differences to work together to try and find a solution for Lim’s paralysis.

On the way to their babymoon, Lea and Shaun get a quick lesson in parenting when they rush to aid an injured dog. Meanwhile, Dr. Danica Powell secretly performs an operation on a friend that could jeopardize her career.

Asher's views on the construct of marriage complicate his future with Jerome. Meanwhile, Asher also briefly revisits his religious past to aid a patient's conversion to Judaism for his fiancée.