This is Vengeance

Back in the public square beneath the scheming calamities, Arthur watched as a commotion rose in the crowd. He saw a man fighting another, then fleeing while holding something. The figure disappeared into the crowd and then into the alleyways.

"You two can keep monitoring Julia and Li for now," Arthur told Dia and Oriole. "I want to investigate this."

"The local police would handle petty theft," said Oriole, stuffing popcorn into his mouth. "Let's just relax, okay?"

"I'd like that, but I have a bad feeling," Arthur replied, smiling at them. "It doesn't seem like relaxing is for me. We'll meet later."

Arthur bid the two farewell and headed out of the square. The others might not have noticed, but Arthur saw something in the man's expression—he looked too unstable for a mere thief.