Cath, a skilled nurse, loses her job for whistle-blowing on her friend. Hoping to get her life back on track, she steals her best friend's identity and feigns being a senior doctor as she starts anew in Edinburgh.
Season 2 recounts the story of Corporal Jamie McCain who was paralyzed after a spinal injury. Just as he starts recovering, he finds himself facing a new enemy that targets a number of patients on the ward.