I read it because I have trouble with plot structure, but some things about it seem confining. For example, what if the protagonist's goal changes, once she realizes what is really going on? That's kind of crucial to my plot, that she do a total 180 once she realizes the truth. Is that something that readers would object to, or is the Marshall Plan just being overly constraining? Actually I can't recall reading any advice that takes into account a change of goal.