Have you ever written or thought of a story and felt that it was a brilliant and original idea? Then you're watching a movie that you have never seen before and your story or idea plays right before your eyes. So goes the saying there is nothing new under the sun. The best your can do is take your story and make it your own. Add a twist, reveal it in an unusual location change the characters or better yet continue to write the story just as you planed it. On the bright side at least you know you're on the right track.
Peace