Set in the bleak, fog-shrouded highlands of Scotland, The Ancient Devil’s Vault follows Ethan Vance, an elite sound engineer who stumbles upon a sealed subterranean chamber beneath the ruins of an 8th-century monastery. Inside, he accidentally restores and plays a forgotten analog recording containing a 13-Hz audio frequency—a malevolent acoustic pulse designed not just to scare, but to systematically erase human consciousness and open a gateway to the abyss. As the sound leaks beyond the studio, it manifests as a living, parasitic force that turns ordinary people into hollowed-out puppets driven by absolute carnage. To save his daughter and stop the frequency from broadcasting globally, Ethan must venture back into the depths of the Vault to face Kroma, the sound-bound ancient demon, in a terrifying race against time where every breath, sound, and heartbeat could be his last.
