Aah, for the modern life. Internet, baby wipes, ease, lemonade on tap. The only problem – well, one of them – is that Greg's mother is demanding the town switch off for a weekend, so good old-fashioned standards can be returned to. She's not the only person with ideas of old-fashioned standards – Greg's grandfather has moved in, so there're both his siblings, three adults – and a pig who thinks he's a family member. Mind you, with the usual ineptitude of a Wimpy Kid, probably nothing modern could prepare Greg for what's about to come, when a trip to a character-forming camp seems like the necessary easy way out…