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Plot
I wouldn't. Personally, I think it'd be best to leave it like the mainstream questline pages. If people want to learn about the story on the site, they can go to a summary page or to the important NPCs' page (Meryl, her grandfather) when they get updated.
Some people might not be interested in the story, and just want to know how to complete it. Others might want help, but want to experience the story on their own. Either way, explaining the story and plot in the event page would be counterproductive as well as disrupting the format of all of the other questline pages we have.