Diary of a Wimpy Kid: The Long Haul revolves around a road trip that the Heffley family embarks on. Usually a family road trip is believed to be amusing… but that is not the case with the Heffleys. Although the journey is quite promising at the beginning, it gradually takes some erroneous twists. Greg never imagined that he will have to face situations and scenarios like Gas Station Bathrooms, wild seagulls, a minor car accident and an escapee pig. However, the most horrible road trips may still turn into an escapade. This is what exactly happened with the Haffley family- a trip which they would not want to forget easily.