Lena positioned the staking gun. “We’re not patching this weld. We’re cutting out the entire section and replacing it.”

In the frozen sub-basement of the North Sea’s newest deepwater platform, Njord’s Vengeance , the steel walls wept condensation. Chief Structural Engineer Lena Vinter ran her gloved hand along a weld seam—her fingertip catching a micro-fissure invisible to the naked eye.

“Then he’ll have it.” She squeezed the trigger. A sharp crack echoed through the sub-basement, and the damaged steel fell away like a scab.

The repair finished at 3 a.m. As the new section cooled, Kael ran a phased-array ultrasound over every millimeter. Zero defects.

“There,” she whispered to her apprentice, Kael. “That’s the heartbeat of failure.”