While Shimura Danzō and Orochimaru were still discussing the details of the experiment in the laboratory on the third underground level, Shisui had already infiltrated the Mizukage Building.
After several years away, the layout inside the Mizukage Building had barely changed. Shisui made his way familiarly to the office door of the Fourth Mizukage, Karatachi Yagura. As for the Kirigakure Anbu guarding the door, they had long since fallen into Shisui's genjutsu.
"Byakugan: Clairvoyance."
Standing before the door, Shisui used the Byakugan's clairvoyant ability to observe the chakra fluctuations inside.
Yet through the Byakugan's vision, there was not the slightest trace of chakra behind the door.
"There aren't any chakra fluctuations inside?"
Shisui was greatly surprised. He had already learned from the Kirigakure Anbu under his genjutsu that the Fourth Mizukage, Karatachi Yagura, was supposed to be in the office at this very moment. The reason he had used the Byakugan was to determine the number and positions of the enemies behind the door in advance.
But the result left Shisui confused.
"Could it be..."
A bad feeling immediately rose in Shisui's heart.
"Creak~"
As Shisui pushed open the door, the scene inside entered his sight. A small figure was seated at the desk in the room. From the person's build alone, Shisui could tell that it was the Fourth Mizukage, Karatachi Yagura.
Even after Shisui entered the room, the other party remained seated without moving, until Shisui reached the desk.
"This is a puppet?"
Only then did Shisui discover that although it wore the skin of the Fourth Mizukage, Karatachi Yagura, the flesh beneath that skin had been almost completely hollowed out, leaving only various mechanical components. It had clearly been made into a puppet. Through the Byakugan's clairvoyance, Shisui even saw a "Scorpion" mark inside the puppet.
"Not