Alfie is so excited to be the very first one home after a busy shopping trip with his mum and his baby sister, Annie Rose. In his rush to get inside, he runs ahead and accidentally slams the heavy front door completely shut behind him. The loud bang means he is stuck indoors all alone, while his family is stranded on the front doorstep without a key! Soon, the entire neighborhood notices the commotion. The milkman, the window cleaner, and the lady from next door all come running to help get the door open. While the adults stand outside trying to figure out how to rescue him, Alfie decides to come up with a clever plan of his own. This warm, relatable story perfectly captures the everyday adventures, minor mishaps, and strong community spirit found in family life.