"It's fun to be a Baby-sitters Little Sister. No fair! Karen is having a bad-luck day. Her favorite jeans are missing. There's no prize in the Crunch-O cereal box. And Boo-Boo the cat runs away from her! Karen tries everything to make her day better. But her bad luck just won't go away. She even gets punished and sent to her room! Poor Karen--will this be her worst day ever?" -- Back cover.