Leila only found the note because her pen rolled under the desk. She had been halfway through a history paragraph when it slipped from her fingers and vanished into the narrow shadow between her chair and the wall. Sighing, she knelt, reached beneath the desk, and felt paper before she found the pen. At first she thought it was an old worksheet. Then she saw the folded corner and the heavy block letters on the front: DON'T READ THIS UNLESS IT MATTERS. Leila should have put it back. Instead, she unfolded it.

If you're reading this, I probably couldn't say it properly out loud. I think someone is stealing answers from the science lab cupboard before quizzes. I saw the key hanging near the staff bench on Tuesday. Please don't say my name.

Leila read the note twice. The room around her continued as normal, but for Leila, the whole afternoon had shifted. At lunch she carried the note in her blazer pocket like it might burn through the fabric. "You look sick," said Asha, sliding onto the bench beside her. "I found something weird." Asha read the note, then looked up. "That is not small." "I know." "So tell a teacher." Leila stared across the courtyard. "What if it's a joke? What if I get someone in trouble for nothing?" Asha folded the note again. "And what if it's true?" That was the problem. If the note was real, doing nothing would make Leila part of it. If it was false, speaking up could turn one secret into a much larger mess.

I think someone is stealing answers from the science lab cupboard before quizzes.

By the final bell, Leila had almost convinced herself to wait another day. Then she saw the science lab door standing open. Inside, Mrs Carter was stacking papers beside the cupboard at the back wall. The silver key hung from the lock, turning gently as if someone had just brushed past it. Leila stopped in the doorway. Mrs Carter looked up. "Leila? Did you need something?" Her mouth went dry. This was the last easy second, the last moment before the problem belonged to someone else as well. "I found a note," she said. Mrs Carter set the papers down. "All right," she said, her voice careful. "Come in and tell me."

Leila stepped inside. The room smelled of bleach and old paper. She pulled the note from her pocket and handed it over. Mrs Carter read it silently, her expression unreadable. Then she looked at Leila. "You did the right thing bringing this to me. I'll look into it quietly." Leila nodded, relief flooding through her. But as she turned to leave, she noticed something: the key was no longer in the lock. It was gone. And Mrs Carter's hand was resting on the cupboard door, as if she had just closed it.