Its the summer holidays the weathers great and all the kids are having fun outside. So wheres Greg Heffley? Inside his house playing video games with the shades drawn. Greg a self-confessed indoor person is living out his ultimate summer fantasy: no responsibilities and no rules. But Gregs mom has a different vision for an ideal summer . . . one packed with outdoor activities and family togetherness. Whose vision will win out? Or will a new addition to the Heffley family change everything?