This question was a bit abstract, so it wasn't clear which novel or movie he was referring to. However, generally speaking, the ending of a movie was decided by the director or screenwriter, not based on real events or the relationship between the characters. Therefore, the ending of the movie was not fixed. It might depend on the plot and character setting of the movie, as well as the director's idea and arrangement. If you have a specific name or plot, you can provide more information so that you can answer your question more accurately.