This competition isn't smooth sailing as the four bladesmiths must use steel from old nautical equipment to forge weld their signature blade, while being forced to do it using a metal inlay technique. After two turbulent rounds, two smiths propel to the final round where they have just five days to forge the Kachin Dao, a deadly headhunting sword.

Four bladesmiths head to a scrapyard to create their signature blade using only harvested metal and a coal forge. Challenges arise when some struggle to keep their fires burning, and ultimately two competitors are left standing. In the final round, the remaining smiths must recreate a fearsome battle weapon, the Kampilan.