Lin Xiu took out the Tri-facet Military Dagger and forcefully stabbed it into the wall crack pointed out by Li Wei.
As if a hidden mechanism had been triggered, the moss-covered wall instantly caved inward. With a loud rumble, the sound of internal machinery echoing through the concrete reached the ears of the boy and girl.
"What era is this, and they still have a hiding spot like a secret room? I thought it would be completely high-tech, like something out of a science fiction novel."
Chapter 132