Diary of a Wimpy Kid follows Greg Heffley, a middle-school boy who uses his journal to document the everyday disasters, awkward moments, and hilarious social struggles he faces at school and at home. Through doodles, sarcasm, and misadventures with his best friend Rowley, Greg navigates popularity, bullying, family chaos, and the painful reality of growing up—often making things worse with his own questionable decisions.