Ruuuuumble!

The vibrations were massive. Gigantic. However, that was about it.

Such massive vibrations suddenly stopped as if they had been his imagination all along. While cocking an eyebrow, Kang Jin-Ho slightly raised his head to look, then a look of understanding settled on his face.

'That was a signal.'

Kang Jin-Ho had been thinking that Jo Gyu-Min would definitely do something to help with the escape attempt. He believed in the chief secretary's capabilities and never doubted his commitment once, after all. However, Jo Gyu-Min must've been worried and nervous that Kang Jin-Ho had no idea about the incoming help. So, he wisely chose to send a signal first.

If Kang Jin-Ho failed to realize that rumbling was Jo Gyu-Min's signal, he would've thought the underground space was about to collapse on top of him. That would have naturally forced him to act accordingly.

Kang Jin-Ho quietly sucked in several deep breaths.

'This is rather outlandish, isn't it?'

A chuckle subconsciously leaked out of Kang Jin-Ho's lips.

It was true that he 'wished' for the people outside to do something. If Kang Jin-Ho were trapped down here by himself, he wouldn't have a problem escaping. However, trying to do the same with Choi Yeon-Ha in tow would be incredibly tough even for him.

However, Kang Jin-Ho couldn't help but chuckle in dismay and dumbfoundedness after seeing through the...