Murciélago, Vol. 22

Celine Argente, an internationally wanted perfumer adept in the art of poisoning, has entered Japan with a group of conspirators, and among them is a former member of the Metropolitan Police Department. The aims of these six criminals—as well as their employer's identity—are shrouded in mystery, but with a little help from the FBI, Kuroko just might be able to track them down! As her investigation begins, an invisible poison creeps through the streets of Ruruie...

Volume 22 of the Murciélago manga series by Yoshimurakana.