"The atmosphere in this tunnel is very uncomfortable, as if something is secretly watching us," Zhao Yang whispered. His voice echoed through the tunnel, carrying a hollow and tense tone, as if infinitely amplified by the darkness. His heartbeat involuntarily quickened, and an inexplicable fear surged through him like a tide. However, he forced himself to remain calm, tightly gripping his weapon. The weapon trembled slightly in his hand, betraying his inner unease.
Lin Yu said, "Everyone, be careful. Observe the surrounding walls and ground for any unusual signs. Any subtle clue could be the key to solving the mystery." Lin Yu's eyes scanned the tunnel vigilantly, not missing a single corner, their gaze as sharp as a hawk's. He knew that in this seemingly peaceful tunnel, dangers and secrets could be hidden at any moment. If they were not careful, they could be trapped in an irretrievable situation.
Ye Li pulled out some specialized detection equipment and began measuring the tunnel's magnetic field, energy fluctuations, and other data. The indicator lights on the equipment flickered, emitting a faint glow that seemed particularly eerie in the darkness. "Based on the current data, the magnetic field in the tunnel is somewhat disturbed, but not enough to cause the train's disappearance. Perhaps deeper in the tunnel, there will be more obvious anomalies," Ye Li said, her eyes fixed intently on the data on the equipment, trying to find some clue in the complex data. Her eyes revealed a hint of anxiety and anticipation.
They moved cautiously along the tunnel, taking every step with extreme caution, fearing that any noise would alert the unknown being hidden in the darkness. Suddenly, Lin Yu noticed some strange scratches on the ground ahead. The scratches were very deep, as if a large object had been forcibly dragged across the ground. Under the illumination of the flashlight, those scratches reflected an eerie light, as if they were the marks left by some mysterious force. "Look, what are these scratches? Did the train encounter some powerful external force here?" Lin Yu squatted down and carefully observed the scratches, his heart filled with doubts, and those doubts hung over his heart like a dark cloud.
Ye Li and Zhao Yang also gathered around. Ye Li squatted down and gently touched the scratches with her hand, her brow furrowed. "These scratches don't look natural. It's more like some powerful force acting on the train, dragging it somewhere. But what force could drag an entire train?" Ye Li's eyes revealed confusion. This new discovery made the matter even more confusing, like a thick layer of fog wrapped around an already complex mystery.
Zhao Yang frowned, his eyes revealing vigilance. "Whatever this power is, it doesn't seem simple. We have to be careful, perhaps it's still nearby." Zhao Yang looked around warily, gripping his weapon tighter. The weapon trembled slightly in his hand, as if it too could sense this unknown fear.
Just as they were about to continue searching for clues along the scratch marks, they suddenly heard a faint sound from deep within the tunnel. It sounded like someone crying, or like a train whistle. The sound echoed through the tunnel, making people's hair stand on end. The sound was like a curse from hell, swirling and echoing in the dark tunnel, drilling into their ears and striking deep into their souls.
"What's that sound? It sounds weird," Zhao Yang whispered. His body trembled slightly, and an ominous premonition came over him. At this moment, all kinds of terrifying images kept appearing in his mind. The unknown fear was like a surging tide, almost drowning him.
Lin Yu said, "Don't panic, everyone. Let's go check it out. Maybe this sound is related to the missing train." Although Lin Yu appeared calm, he was filled with fear. He knew that a great danger might lie ahead, but to uncover the truth behind the missing train, they had to move forward. He took a deep breath, trying to suppress the fear within him, which was like an invisible hand, tightly gripping his heart.
The three of them cautiously followed the sound. As they drew closer, the sound grew clearer. The sound seemed to possess a magical power, causing their hearts to beat faster involuntarily. Every step felt like stepping on their own heartbeats. In the darkness, they could sense countless pairs of eyes staring at them, their gazes like thorns in their backs, making them feel uneasy. The air around them seemed to freeze, and every sound was amplified. They could even clearly hear the sound of their own blood coursing through their veins. In this dark tunnel, they were like souls lost in hell, alone and fearful, approaching the unknown and terrifying sound...
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