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...对于王室四分五裂、无足轻重的可怕设想In the worst-case scenario, you could become a homeless person...最坏的情况是你可能会无家可归。
N-COUNT
(电影的)剧情梗概
The scenario of a film is a piece of writing that gives an outline of the story.