Actually, I'd suggest it didn't. The prompt implies (but without explicitly stating) that she is the passenger (maybe even one of several) in the helicopter. You wouldn't say "in which only she survives" if she was alone. But the response has her piloting it, with no mention of others on board. I think this illustrates how ChatGPT doesn't really understand the text it is manipulating.
But to refer to it as "understanding" anything is to make a rather large leap of faith, IMO. (Or it's a devaluing of the word "understand".)
ChatGPT's response is good because this prompt has a lot of detail. You'd still need to hand hold it through the rest of this story if you want something interesting.
So here's me continuing that prompt a bit longer: https://pastebin.com/N3tRtULs
It's frankly excellent at anticipating the expected beats in the story: "Alicia couldn't shake the feeling that she was being watched" is great.
But each response follows the format of "Alicia verbed. As thing happens other thing happens. Then, final thing occurs", and the choices follow the format of "Try to x, despite y".
this is absolutely terrifying. the future is getting bleaker and bleaker.