How do you separate your personal life from your professional life? Not easily. And if you're on the emergency room staff of Chicago's County General Hospital, it may be impossible. As a third-year resident, former nurse Abby Lockhart asserts her authority in the ER, but the stress and complications of raising a child cause a rift between her and Dr. Luka Kovac. And while Chief of Staff Kerry Weaver remains determined at work, she finds herself at a personal crossroads as both a woman and a mother.