The blip on the sonar screen solidified, its alien signature pulsing with an intensity that mirrored the strange, swirling patterns of the tattoo on Arkan’s arm. He leaned closer, his breath fogging the ancient monitor. The object was immense, silent, and impossibly deep. It was not natural, and it was not any known terrestrial technology. It was calling to him.
"Arkan?"
Zara's voice, sharp with concern, cut through his concentration. He didn't turn. His gaze remained fixed on the screen, a knot of cold dread tightening in his gut. He could feel it, a low hum resonating within his bones, a strange, primal acknowledgment of the signal.
"What is that?" Riley asked, stepping into the cramped bunker, his hand instinctively going to his sidearm. Maya and Luna were close behind, their faces e
