Yet another character packs in their job at the end of a shift. As I understood it, last night, Essie was walking out never to come back. And who was the patient whose body was being systematically dismantled? I'm afraid I found the whole progamme rather heavy going last night.
I think the patient died from sepsis after the transplant and Essie and the young doctor (can't remember her name) were responsible for aftercare - so she feels to blame. Like you I struggled to follow it, so I could be wrong