Young spy Harriet M. Welsch (Jennifer Stone) crosses paths with popular student Marion Hawthorne (Vanessa Morgan), as the two girls compete to become the official blogger of their high school class. After Marion has started blogging, Harriet lags behind because she reports what she finds interesting. Unfortunately for Harriet, her classmates do not share her views and state that her blog is boring. Harriet's nanny, Golly, suggests that she write something is of interest to both Harriet and her classmates.