Since today is the hospital's 100th anniversary, the new chief, Amanda Lee, arranges for Carter to escort a woman, Ruth Johnson who was born 100 years ago today, around the hospital. Lee encourages Greene to supervise a study on a new pain medicine, and he agrees. Benton considers cochlear implant surgery for Reese. Corday ends her relationship with Benton. Hathaway treats an 8-year-old boy whose friend was mysteriously shot and killed.