Sara knew something was wrong before the second bell rang.
Lina's lunchbox was missing again.
Not lost. Missing. There was a difference. Lost things looked confused. Missing things looked planned.
Sara opened her purple notebook and wrote in her most official handwriting: Case 14 - The Lunchbox That Refused to Behave. Under that she drew a tiny lunchbox with suspicious eyebrows.
On Monday, Lina's lunchbox had appeared on the art shelf between two paint jars. On Tuesday, it had been inside the lost-and-found basket wearing Kabir's spare cap. Today, Wednesday, the blue shelf was empty.
"Maybe it walked away," said Kabir, opening his backpack. A banana smell puffed out so strongly that Maya leaned back.
Sara sniffed. "New theory: the lunchbox ran away from your banana."
"Reasonable," Kabir said. "Even I fear it."
The class offered theories at snack time. Meera thought the lunchbox had joined the library because it liked quiet. Aarav said maybe Lina forgot it at home. Again. A few kids laughed. Lina smiled too quickly.
Sara noticed that smile. It came and went like a light switched off.
At lunch, Sara found the lunchbox behind a stack of chart paper. A note was taped to it: Princess Pickle Palace.
Lina grabbed the note and crushed it in her fist. "It's nothing."
Sara wrote: When someone says "nothing" in a tiny voice, investigate the tiny voice.
The next day, Sara tried a stakeout from behind a library book called Amazing Weather. This was difficult because Kabir kept whispering weather facts he had invented.
"Chance of meatballs: thirty percent."
"Quiet, Assistant Banana," Sara whispered.
At snack time, she saw Aarav slide Lina's lunchbox behind the globe. Fast. Practiced. Like a magician hiding a coin.
Sara almost shouted, "Caught!" Her mouth even made the C shape. Then she saw Lina watching too, cheeks pink, pretending very hard to fix her shoelace.
A loud catching would make everyone look at Lina. Sara shut her mouth. This was one of her greatest detective achievements.
At recess, Sara sat beside Aarav on the low wall.
"Why Princess Pickle Palace?" she asked.
Aarav blinked. "What?"
"The note. Is it because her lunch smells like pickle?"
He kicked a pebble. "Everyone laughed."
"Lina didn't."
"She never says anything."
"Maybe saying something is harder when everyone is laughing."
Aarav stared at the playground. "I thought she acted fancy. Shiny clips. Neat lunch. Always perfect."
Sara thought of three sharp replies. She swallowed all of them because sharp things did not fix bruised things.
"Maybe neat lunch is just neat lunch," she said. "Maybe she wants to eat without being a palace."
After lunch, Aarav walked to Lina's desk. He did not make a speech. He did not stare at the floor forever. He just said, "I moved your lunchbox. I shouldn't have. Sorry. I won't do it again."
Lina looked at him for a long moment. "Don't call my food names."
"Okay," Aarav said.
The next day, Lina's lunchbox stayed on the blue shelf. Beside it, Kabir placed a folded paper that said: Official Lunchbox Parking. No bananas within three notebooks.
Lina laughed for real this time.
Sara closed her notebook and wrote one final line: Case 14 closed. Lunchbox safe. Banana still suspicious.