An unexpected inheritance give Greg Heffley's family a chance to make big changes to their house. But soon they find out that home improvement isn't all it's cracked up to be. Once the walls come down, all sorts of problems start to crop up. Rotten wood, toxic mold, unwelcome critters, and something even more sinister all make Greg and his family wonder if the renovations are worth the trouble. When the dust finally settles, will the Heffleys be able...

While trying to find a new best friend after feuding with Rowley, middle-school slacker Greg Heffley is warned by older family members that adolescence is a time to act more responsibly and to think seriously about his future.