SOME SECRETS AREN'T MEANT TO BE DUG UP. THEY ARE MEANT TO BE KEPT SILENT.Three years ago, on the highest battlefield on Earth, Major Adheer Negi uncovered a relic that defied time itself. The discovery cost him everything-his team silenced, his record erased, and his life reduced to a ghost in exile.But the signal has returned.Hunted by a classified drone in the Himalayas, Adheer realizes the past is not finished with him. He holds the one object a shadow organization would kill to possess-a dark metallic seal stolen from the ice. It is not just an artifact.It is a key.At the ruins of Dholavira, Dr. Sanya Roy watches a private military force drill into the salt flats, intent on waking a machine capable of reshaping warfare. She knows the truth: the ancients didn't disappear because of disease.They silenced themselves.Now, forced into a deadly alliance, Adheer and Sanya must race from the scorching Rann of Kutch to the frozen peaks of the North, following a trail of acoustic clues left behind by a lost civilization.BECAUSE THE ULTIMATE WEAPON ISN'T A MISSILE. IT'S A FREQUENCY. AND IT'S GETTING LOUDER.