洞穴里的真相

The students entered the cave one at a time. Inside, they found the keeper beside an injured stranger. The stranger had fallen while trying to climb from a small boat, and the keeper had come down to save him. A rockslide then blocked their way out. The keeper's pocket radio was damaged, so he had tapped the clue THREE SHORT, ONE LONG on a pipe that reached the lighthouse wall.

The number 311 was not a radio code. It described the third shelf and the eleventh book in the lighthouse library, where an old map showed another tunnel. Jin refused to give up when the first passage ended at a stone wall. He noticed fresh air moving through a narrow gap and found a way to widen it with a metal bar. The keeper explained which rocks could be moved safely, while Theo used chalk to mark their return route. Nobody spoke about fear, but each person checked on the others. Working together, they helped the injured man through the tunnel. Behind them, the sea rushed into the main cave and erased every footprint.