Cath Hardacre is an idealistic, hardworking nurse who dreams of bigger and better opportunities for herself. So when she sees her hospital’s standards slipping, she raises her concerns with the hospital trust. However, Cath is stunned when she loses her job for whistleblowing. In order to provide for her young daughter, Cath is forced to take drastic measures. She steals her best friend’s identity as a doctor and begins a new life in Edinburgh as Dr. Ally Sutton.