If you talk about a likely or possible scenario, you are talking about the way in which a situation may develop.
例句
...the nightmare scenario of a divided and irrelevant Royal Family...對于王室四分五裂、無足輕重的可怕設想In the worst-case scenario, you could become a homeless person...最壞的情況是你可能會無家可歸。
N-COUNT
(電影的)劇情梗概
The scenario of a film is a piece of writing that gives an outline of the story.