Each player will write about the actions that their character takes in response to the plot and actions of other characters around them. Each player will only post events from the perspective of their own individual character. While it is sometimes necessary to include another characters short response in their writing, it is never acceptable to post character changing or defining information, thoughts, or major reveals about another character without their express permission.
Each post builds upon the last as a story is created, and the narrative is pushed forward. Writers are free to introduce new elements into the plot so long as they fit naturally into the story.