"Was this where they disappeared?"
Hong Hai carefully surveyed the surroundings.
At the bottom of a cliff was a recessed area surrounded by stones dampened by moisture. If one did not venture this far in, it would indeed be difficult to spot from above the river valley.
The key was that she had followed the signal source all the way here, but how had Little Luo Sir found this place for no reason? What kind of person would come running to a barren place where not even a blade of grass grew?
"There's a mechanism here." Little Luo Sir pointed directly at an inconspicuous rock. "Move the stone, and you'll see the entrance."
Hong Hai pressed a hand against the stone and pushed with a little force, but she could not move it. Although she looked petite, as Niu Daguan's daughter, she actually possessed the brute strength of a wild bull. A casual push from her could move a cargo truck.
"There's a groove here. It looks like it needs some kind of tool or key to open." Hong Hai quickly noticed the clue. "Who are those sneaky people you were tracking? If they're manageable, then we don't need to worry about alerting them."
"What does Miss Hong Hai intend to do?"
"If they're people we can deal with, then there's no need to fear alerting them." Hong Hai shrugged. "We can just blast this troublesome thing apart."
Although she was rash, she was not the kind of person who knew only how to charge in recklessly.
Little Luo Sir smiled faintly. "Actually, there's a way to open it."
"What way?" Hong Hai immediately furrowed her brows. "You have a key?"
Little Luo Sir then took out something resembling a small black hairpin and reached his hand into the crack