The Resonance Bridge would be the greatest engineering achievement in a century — a resonance-anchored structure connecting Iron-Thorn and Frost-Hold through a stable harmonic link, revolutionizing trade and communication across the entire northern range.

The project requires something that has never been done in peacetime: merging the two resonance traditions that have been separate for millennia. Iron-Thorn sends Revna Iron-Thorn — young, brilliant, and determined to prove she's more than the famous cousin's shadow. Frost-Hold sends Svela Frost-Kin — forty years of Thrum mastery, a reputation as the finest stone-reader in the northern range, and a deep, principled conviction that the hybrid techniques are dangerous.

They're wrong about each other. Revna's brilliance is real, but her framework has gaps that only Thrum can fill. Svela's tradition is powerful, but the Bridge site's unique geology demands techniques she's never used. Neither can succeed alone.

And the fault line itself has secrets — ancient resonance patterns buried in the ice that respond to neither Aria nor Thrum, but to something older than both.