Ultimately to get a good plot you need a good story. What you want to do is look into some short story writing workshops. Get some stuff down on paper and then go around asking for advice.

To make something flow you need to concentrate on a functional world in which a set of events is taking place. To be able to do this you should write a few paragraphs outlining what it is that you want to portray, what story it is that your people will live out. Ultimately you need to be good at writing before you can make a good plot and to become good at writing you need to practice doing it.

Good luck, it's a long road and you have to understand that great works like lord of the rings can take a long time to write. In LotR case it was "The product of 17 years of writing and a lifetime of scholarship and thought."

That's right, it took 17 years of revising and writing to come up with the Lord of the Rings trilogy. Obviously most stories don't take this long to write, but it should give you some appreciation of the amount of effort and time that goes into crafting a universe. Frankly, if you're having problems stringing together events you just aren't on the level writing-wise for creating your vision.

I'm not saying you can't do it, I am saying you need practice and it will take years before you can do something like you are proposing properly. What you are proposing is like someone saying they want to draw a grand picture without having ever drawn before, or someone looking to make a hit song when they have never touched an instrument or looked into music before. Writing is no different from any other skill, it must be practiced over time.

If you can team with a writer that might be a good option. The other option is to scale back your design or your expectations.

So, in point form your options as I see them:

-Practice traditional writing, study other successful stories, spend a couple years practicing your storytelling and then attack this project.

-Get a writer who can craft a story along some guidelines you present... It will be tough finding someone who wants to take your ideas and modify them unless you are willing to pay money because no matter what cool ideas you think you have, most writers have their own ideas and would rather flesh those out than work on someone elses. Everyone has ideas, not everyone is willing to pay to have those worked on.

-Scale back your design vision and start a bit smaller. Work on a game with a more simple plot and learn from that experience.

Along these lines I would suggest googling and checking out "Cave Story" which is a wonderful game with a great little storyline well integrated in the game. It shows how powerful even a simple storyline can be if integrated properly.

There is an english adaptation of the japanese version, if anyone has a link to it please post it, I remember there was an installer with everything bundled together but now I can only find the patch and original (which still work, but aren't as convenient.)

Sometimes this means you don't have enough going on in your story - i.e. subplots. Think about the different story lines you have (hopefully you have some). It can also mean you're not thinking about your characters' motivations. What is it each of them want? What are their goals and what are they doing to achieve them?

As a way to break out of the writers block, try writing a little story between two or three of your characters that has nothing to do with your story. Put them in a situation and see what happens. This can sometimes result in inspiration and insight. Other times it can be a (fun) waste of time, but at least it gets your mind off the block - and sometimes that's enough.

Cheers