Saving Professor (Part 7)

The rest of the day was spent with the two twins wandering around the building. All of the workers were some sort of secret agents, and they all had been told about Petra and Collier.
After exploring numerous floors (and even ones that had “Do not enter” boldly posted on them) they found themselves in the elevator. It was an especially amusing one, because it was glass. They could see out the window and over the city as they went up and down.
“Hey, remember how that lady told you to go to the fifteenth floor?” Collier asked.
“Yeah. That was weird, wasn’t it? There is no fifteenth floor.”
“No, I bet there is. We just have to find it.”
“How?”
“I don’t know, we just have to think about it.”
The elevator clicked and the doors opened. The twins walked out onto the sixth floor.
“There’s no way that she would have made that mistake,” Collier continued.
“Maybe we just understood her wrong?”
“How big are the chances that both you and I heard her say the same thing and it turns out we weren’t even right at all? Besides, remember when that man told Professor not to bring us to his office?”
“Right. Yeah, I remember.”
“And he never did, right? So his office is on the fourteenth floor, but he doesn’t want everyone to know that.”
“And neither does that man.”
“I know, right? So we just need to find that floor.”
“Don’t you think Professor’s going to show it to us sometime?”
“Maybe. But it’s more fun finding it by ourselves. What do you say?”
“Yeah. Let’s go for it!”
The kids dashed back into the elevator and examined the buttons.
“The numbers only go to fourteen. The other buttons are ‘Fire Alarm,’ these are probably for keeping the doors open and closed, and this is the basement.”
“Wait, Collier?”
“Huh?”
“You thinking what I’m thinking?”
“Yeah, I think so. Push the button.”
Petra punched the button that was labeled “Basement.” The elevator started going down. It went down, down, down… and eventually they couldn’t see anything out of the window, because they were underground.
Then the doors opened and revealed—
A parking lot.
Their hearts sank.
“I don’t think this is it,” Petra noted.
“No, really?” Collier asked sarcastically. “Let’s go back.”
“Yeah.”
The doors closed and they punched in ’14.’ On the way up, Collier pointed out, “We haven’t tried all the buttons yet. Let’s do that.”
The elevator beeped and the doors opened.
Collier pressed the open button. The doors stayed the same. Then he pressed the close buttons. The doors closed, and the elevator stayed where it was.
“Now what?” he asked.
“I guess we should’ve gone out.”
“Yeah, probably so.”
Petra leaned over to press the open button, but, instead, she accidentally pushed the close button again.
“Petra, what are you doing?”
“I don’t know, I—“
And then they realized that they were plummeting down. Petra screamed and clung onto Collier.