I've run into this problem, and it's been bugging me for a while now. I keep coming up with great concepts, but rarely do I think of a plot that can match them. One concept in particular has been the worst. Anything I come up with feels contrived because in a way, the concept doesn't actually require anything deeper than the concept itself, simply because the concept is nothing more than a bunch of rules that, if applied to real life, would create interesting scenarios, or cause a person's life to play out a certain way. Take for instance, the premise of Highlander. Okay, so these people are immortal, and can only be killed if they are beheaded. The last highlander alive becomes all powerful. That's basically the premise. Is it enough to simply follow the life of a single highlander, from beginning to end, exploring the effects of the rules brought about by the concept, or does the plot need something deeper, something that either couldn't be revealed in the beginning or couldn't be understood until the end? In other words, how do you come up with a plot, adding characters, antagonists, and events to a story that is essentially a clean slate with a few rules? ....Hm, this is a stupid question. I'm starting to doubt whether or not I actually know what I'm asking..