Olivia sat at her desk, sifting through old boxes of her grandmother's belongings. She had always loved visiting her grandmother, who had a magical way of making everything feel special. As she opened a dusty, ornate wooden box, something glinted in the corner. It was a small, intricate key, and it didn't seem to fit any lock she knew. 'What could this be for?' Olivia wondered aloud, her curiosity piqued.