Greg Heffley who was also the main protagonist of other books in the series of Diary of a Wimpy kid, as he goes into middle school where undersized weaklings like him has to share the hallway with much stronger, taller and meaner boys and how he struggles to fit in there. Greg’s mother has gone back to the college for some months and with his friend Susan also gone, Greg is left alone to take care of him and the household chores. While he has been long waiting to grow up, when he actually does, he realises that there is too much hype associated with being a grown up. The hazards of being a grown up is more than the benefits and the things that he experiences, it is not unique to him and all the readers too can associate well with it. He has to face the 'ugly truth’ of growing up and the skilful narration and anecdotes are not just hilarious but also an eye opener for all the kids praying to grow up soon. The book truly justifies why childhood is called the most amazing part of life.