Avery bumped into Mr. Black violently with her head. Mr. Black felt a sharp pain and covered his forehead, but he got freshen up now.

At the same time, there were some noises in the room. The sound became gradually strengthened.

The noises made Avery and Mr. Black incapacitated simultaneously. After a while, Mr. Black couldn't stand the stimulus and fell to the ground with his ears covered.

"Cover your ears," Mr. Black looked painful. At the same time, Avery covered her eyes too. She felt the pain again and again when the noises passed through her ears.

"What happened?"

"The kidnapper wanted to disturb and destroy us with the strong sound wave."

Avery opened her mouth in surprise.

She had heard a sonic weapon, which is a kind of strong sound wave that was employed to create intense air pressure and cause physiological reactions, such as blurred vision and nausea. The air pressure is powerful and highly penetrable, which can shatter glass and break concrete into the piece.

In the meantime, infrasound waves also took effect, which can cause neurological disorders or even cause severe pain in guts when the brain receives it.

According to the information that Avery had learned before, Avery predicted that what they were listening to was infrasound waves.

"So, we just heard the moan of pleasure because of the hallucination caused by insanity?" Avery thought to herself.

Her ears seemed to be pierced, and she fell to the ground all of a sudden.

She had never expected how cruel the kidnapper was. What a brutal action!

Avery felt like being a caged laboratory mouse.

"It hurts," Avery was so painful that she was just lying on the ground with a sorrowful expression.

Mr. Black gritted his teeth and turned to help Avery, but he found that he couldn't even save himself.

Avery heard rapid breathing from herself. Her body was weak, sweating continuously. She couldn't stop coughing as if her lung was going to get out of his body.

Mr. Black suffered too. He knelt on the ground, trying to lift his head as if he was looking for something.

Mr. Black found that there was a little rubbish on the wall.

Avery suddenly found Mr. Black stood up all of a sudden and walked towards the wall on the left. There was a small spot on the wall.

"What's going on?" Avery made a strenuous effort to ask. She couldn't even open her eyes.

"The sound wave is coming from here."

Avery widened her eyes in surprise. It was just a little black spot. It couldn't be found if you didn't search it carefully.

"Is there any way to shut it up?"

"I think, probably, there is no way to solve the problem," Mr. Black tried to shake his head.

"Is there any way to stop it from making a sound?"

Mr. Black frowned and thought for a moment, "Sound waves can't spread in a vacuum."

"Vacuum?" Avery repeated it again and again. Then she glanced over the rubbish on the ground. There were plastic bags, photo chips bags, and empty beverage bottles.

After a while, Avery thought it over and said, "Get the spot."

"What are you going to do?" Mr. Black saw that Avery was crawling over to the pile of garbage on the ground.

Mr. Black bore the pain and walked over Avery. When he was going to help Avery stand up, he saw that Avery was picking up an empty plastic bottle and a plastic bag with a seal.

"What's the matter with you?" Mr. Black couldn't understand what Avery wanted to do. He thought Avery was sick and nauseous, so she picked up a garbage bag.

But Avery handed the garbage bag to Mr. Black and added, "Come on! Help me!"

Although the sound wave was not high now, they must be dead if it kept sounding for a long time. Avery and Mr. Black needed to stop it.

Avery was no more energy to explain. She tried her best to hand the garbage bag to Mr. Black.

Mr. Black didn't ask again, but squatted down and got the bag.

"Put the spot in the bag," Avery pointed to the radioactive source, which just liked a black button.

Avery squeezed the plastic bottle hard to squeeze the air out.

Mr. Black suddenly became hopeful because he understood: Avery wanted to draw the air out of the plastic bag with the bottle. Finally, it would be a vacuum.

"What a smart woman! It is a joke when I say I want to marry her. But now I found she is so smart. Anyway, I must marry her," Mr. Black thought to himself.

Avery pumped the air in the plastic bag without realizing that Mr. Black stared to appreciate her very much. Avery kept panting. It was not easy for her to squeeze the plastic bag, which was too hard.

Mr. Black then got the bottle.

Finally, they pulled out the air together. Noises disappeared.

Suddenly, the wall opened automatically. Evan appeared just like a god.

Avery couldn't see his expression clear because Evan was standing opposite the light.

Evan walked over Avery fast and grabbed her into his arms.

"Are you okay?" Evan asked Avery in a low voice. In that room, Evan found a switch and opened the wall. Otherwise, Evan would break the wall with some kind of tools.

"Mr. Lautner is a lucky man," Mr. Black looked up and down at Evan. He couldn't believe that Mr. Lautner was still alive.

Avery was a little breathless because of the hug. When she knew Evan was still alive, Avery also relieved all of a sudden. She tried to push him away, but Evan held her more tightly.

Avery shook her head, asking, "What happened to you?"

"I heard the voice."

"The kidnapper tried to disorder our mind with sound waves."

Mr. Black stumbled, "Did Mr. Lautner hear…"

Evan glanced over Mr. black and Avery, and then he was sure that it was hallucination.

"We should find a way out," Avery said seriously.

Now, Avery was anxious about the little princess. She was alone.

"Is there someone coming to save us? If there is, did they save the little princess? If there isn't, the little princess will still be kidnapped. Since the kidnapper didn't kill us, I guess she won't hurt the little princess now.

After all, the little princess is the tool for them to control me," Avery said to herself.

Evan looked around and said, "I'm afraid that it is not easy to get out. I played chess and won so that I can find clues to open the wall. I guess there should be more than one room here.

Besides, we don't know what the freak will do next."

Avery picked up her phone. The screen cracked but still worked.

Avery unlocked the phone and called Adan for seek help. Avery predicted that they must get hurt even if they could get out from here.

The situation must be worse.

However, there was no signal in the room.