'What Has Happened to Lulu' is a poem about a young sibling (the persona) who does not understand why 'Lulu' (the older sister) is missing. The mother, who found Lulu's runaway note, decides to not tell the persona that Lulu had run away with a guy (presumably the boyfriend) and had taken her moneybox with her. The mother faces many emotions like anger, regret and sadness but the persona is too young to understand what is going on.