Kang Oh and Eder explored Gummons Tower in search of a hidden dungeon. 

Gummons Tower was a white, 5-story tower.

Different monsters spawned on each floor. There was also an observatory at the top of the tower, which gave players a view of the stars. 

Though they hadn’t been searching for very long, Kang Oh’s Hyper Intuition went off.

It was the feeling that something was out of place, which meant that there was something here. 

"Here!"

Kang Oh pointed at the white brick wall. To be more specific, he pointed at a brick that seemed older and more worn out than the others. 

He immediately pressed on the brick.

Rumble.

The wall turned with a 'rumble', creating a passageway large enough for a person to walk through. 

[You have discovered the hidden dungeon, Gummon's Underground Waterway.]

He found a hidden dungeon!

Yet his expression was frozen stiff because he hadn’t been ‘the first’ to discover it. 

"Tch."

Kang Oh clicked his tongue.

"What's wrong?" Eder asked.

"Someone must've cleared this dungeon before."

Finding a hidden dungeon didn't guarantee a huge payout; only an undiscovered hidden dungeon would. 

"Shouldn't we take a look inside regardless?"

"Yeah....