Welcome to Camp Fill-in-the-Blank is about a fourteen-year-old girl named Page (without an "i"), who lives in Riyadh, Saudi Arabia, where her Canadian parents work. Page's perfectly organized life turns upside down when her parents send her to Prince Edward Island to babysit her cousins Crusoe and Danger (those are their real names) for the summer. The only problem is that her cousins feel that they are too old to have a babysitter—they would rather be at summer camp. Page realizes the solution to the problem is to give her cousins exactly what they want: summer camp in their own backyard. Despite Page's meticulous efforts to plan a different theme for each week of Camp Fill-in-the-Blank, she quickly learns that life with her cousins rarely goes according to plan.