Ok, the bad news first. You're not the only ones out there who think they have a killer movie idea. And I don't know, maybe yours really is, but most of the time all those thousands of scripts and movie ideas aren't worth a producer sitting down to talk with you. This business is all about who you know. Thousands of people try to break into the industry each year, and hundreds of them probably never will. You best bet is to try and make this film yourself. Ok, maybe that's not really an option. If your movie requires millions of dollars to get made, perhaps it's time to rethink that idea. No matter how good, no producer is going to shell out millions on two people completely unknown in Hollywood. Maybe you could try to get a film student to make your film. Independent films can often go very far.
Ok, some good news (more like advice). Because Hollywood is all about who you know. Start getting to know someone...and not just for the purpose of getting your story heard or made by a producer. Send letters to directors, producers, writers, etc of movies/tv shows that you like their work. You probably won't get a letter to Spielberg or Lucas, but there are plenty of people out in the industry doing great work that aren't making millions. Just let them know you love what they do, and really mean it. You might start up a letter conversation and eventual friendship. I had a friend who sent a letter to a then unknown actor because she loved his work in this little known film (don't even ask for specifics, this was from a long time ago). They started talking, and he said next time she came to Southern California to let him know. She did, and he got her on the set of this big movie he was working on. See, she was a fan before he made it big, and he remembered her years later. Something like that could open some doors for you later, but don't try to sell your script right away, that's not the point.
But realistically, you're competing with thousands of others who "want to write, direct, produce, etc" as well as the people already in the industry who have careers.