Amelia was excited for her first day of fourth grade. As she walked through the school doors, she noticed something peculiar - her lunchbox was missing! She looked everywhere, but it was nowhere to be found.

Determined to solve the mystery, Amelia asked her new classmates if they had seen her blue and yellow lunchbox. One of her friends, Samir, said he had noticed a strange boy in the hallway earlier that morning carrying a lunchbox that looked just like hers.

Amelia and Samir decided to investigate. They searched the school, checking every classroom and even the cafeteria, but the lunchbox was still missing. Just as they were about to give up, they spotted a boy sitting in the corner of the library, eating a sandwich from a familiar blue and yellow lunchbox.