A man with a skull patterned balaclava was circling around his opponent. His sleeves were pulled up to his elbows, displaying his arm tattoos. The hood of his black jacket was pulled up over his head, casting his face in darkness.

The street fight was loud and rowdy. Cheers came from the crowd that had surrounded the two men in a brawl—a fist fight, for bets.

It was late at night. A wanderer was on their route home, when they discovered the ruckus in the street and became intrigued...