Lila is seven years old and has a red backpack. She lives by the playground, right next to the school. One morning she found a smooth pebble in the sand. The pebble glowed quietly, like a small torch in her hand. Lila whispered: "Shine", and the light obeyed. It jumped on the swing, danced down the slide, winked at her. At school, the lights in the corridor suddenly went out. Children whispered, and someone stumbled slightly. Lila felt a pebble grow warmer. A ray slipped out of her hand, very narrowly. Bright footsteps appeared on the floor, a single line. The steps led towards the closed door to the cellar. Lila glanced at the lady, but the lady had disappeared into the crowd. She heard a quiet meow, like from under the stairs. "Hello? Who's there?" she asked, holding up her hand like a torch. The footsteps stopped at an old, heavy padlock. The light began to swirl, like a key in a lock. A narrow gap slid out of the darkness, growing brighter and brighter....