Actually... ideas are exactly what you copywrite.
I am not sure what country you are living in my friend (or should I say fiend?), so your laws may vary (although probably not because most countries have followed the same basic rules since the Berne Convention) but in the United States, you cannot copyright an idea. This is from the United States Copyrite Office of the Library of Congress.
"Copyright does not protect facts, ideas, systems, or methods of operation, although it may protect the way these things are expressed. See Circular 1,
Copyright Basics, section "http://www.copyright.gov/circs/circ1.pdf."
Here is the link: http://www.copyright.gov/help/faq/faq-general.html
So, the way specific details have been expressed may be protected, but the basic idea that Dragons are waking up and attacking and the protagonist needs to go warn the nearest Jarl and then find the locations of the dragon spawns by locating a stone tablet map in an underground lair is going to be to generic an idea to be protected. Of course you have to tell the story in an original way using your own words.
Do you think the producers of Barb Wire (1996 starring Pamela Anderson) paid Warner Brothers when they copied the basic plot elements of Casablanca? No because Barb Wire was new and original (a different expression of the idea), despite following the same basic plot as Casablanca.