Zhang Li's iron-forging skills were unmatched in Wucheng. One day, a pale-faced scholar showed up at his shop and caused a scene, demanding that Zhang forge him a fast blade. Just as Zhang Li finally finished forging the black iron into a blade, he discovered that his wife was carrying the scholar's child. In a fit of rage, he used the blade to kill the scholar, unaware that this had all been part of the second-in-command's scheme.