International serial murder?

Tokyo, 8 am.

"What?" Masako Yangshan's strange voice came from the phone."You ... Aren't going to the police station with me? Then ... Where are you going?"

"Masako," Zhao Yu said,"I have an urgent matter to attend to. Please help me get the information from the police. I'll see you at noon!"

"This ... Alright," Masako said,"then let's keep in touch! Great detective Zhao, I've already applied for an album, you can't give up halfway!"

"Don't worry!" Zhao Yu said,"I'm here for this case. Don't worry, we'll contact each other at noon. Book a place, my treat!"

"Alright!"

After agreeing, Masako hung up the phone.

"Here," li Bencheng's voice sounded in Zhao Yu's ear,"this is the bulletproof vest that I kept in the safe house. Although it's not the latest model, it's just in case!"

"Oh ..." Zhao Yu looked at the bulletproof vest that li Bencheng handed over. It looked like a small waistcoat, but it was more delicate.