Lugnuts is merely stating this can be done, even, if you like, can be gotten away with. I think 1ragincajun's question was more concerned than just wondering about what is possible or not. In Wikipedia film articles I've come across ridiculous, tiny detail by detail plot synopses from beginning right through to the very end. And, yes, that's 'allowable', but can be very annoying to many. The problem further is that then there may be no real in depth discussion of the film beyond giving the structure of the plot away, leaving a shallow, spoiling article.

So I was a bit relieved to find the current Norwegian Wood synopsis.  It doesn't seem to have been suggested much, though ideal would be for films to have a separate full plot Wikipedia page, containing the full synopses first also. It would leave it possible for people who haven't seen a film to read the main film article page without having to learn of what happens through to the end.

Anyway, ideally, I agree with 1ragincajun. Isn't it possible to be a bit more vague about the development, including something like - 'the hero's life develops with these 2 love interests in an emotionally tight film involving tragedy'? Just a thought.