At this moment, Ye Qiu felt an excruciating pain in his heart, as if it were being twisted by a knife. Tears streamed down his face uncontrollably.

Even he didn’t understand why he felt this way.

Was it because of this person called Ghost Servant in front of him?

I don’t even know him. What does his death have to do with me?

But for some reason, Ye Qiu felt an overwhelming sense of grief, as if he had lost a very important family member.

It took a full three minutes for Ye Qiu to gradually calm down. At this moment, he remembered the last words Ghost Servant had said.

“The thing is under the stone bed. What thing?”

“He also said it was left for me, but I don’t even know him!”

Ye Qiu’s mind was filled with confusion as he walked to the stone bed and shone his flashlight around.

Soon, he found a brick under the stone bed.

The inside of the brick had been hollowed out. If Ye Qiu hadn’t activated his Heavenly Eye, he might not have discovered it so quickly.

Ye Qiu picked up the brick and saw something like a cloth inside. He took it out and unfolded it, discovering that it was actually a map.

Although the map was very old and stained with some blood, the mountains and rivers drawn on it were still clearly visible.

In the lower left corner of the map were two small seal script characters. Ye Qiu stared at them for a long time before he could recognize them.

“Treasures!”

Ye Qiu’s heart trembled.

Could this be a treasure map?

He held the map in his hands, examining it over and over, and discovered that it emitted a faint fragrance. This surprised Ye Qiu greatly, and he lowered his head to take a sniff.

Instantly, a faint, refreshing scent filled his nostrils.

In that moment, Ye Qiu felt all his fatigue vanish, leaving him feeling refreshed and invigorated.

“This is… Shu Brocade!”

Ye Qiu was shocked.

Shu Brocade has a history of more than two thousand years, made from silk and extremely precious. Its production process is complex and inefficient, hence the ancient saying, “an inch of brocade is worth an inch of gold.”

In the past, Shu Brocade was a luxury only enjoyed by royalty and high-ranking officials.

The fact that this treasure map was made from Shu Brocade indicated that it must have an extraordinary origin.

Ye Qiu examined it for a long time but couldn’t make any sense of it, so he put the treasure map away.

Only then did he remember that he had forgotten to ask Ghost Servant an important question.

Mandala Poison is not contagious, which means that the five households in the apartment building, totaling twelve people, died from direct contact with Mandala Poison.

But how did they come into contact with Mandala Poison?

Undoubtedly, Ghost Servant was the source of the poison.

What Ye Qiu couldn’t figure out was the transmission route.

He shone his flashlight around and eventually found a square pool in a corner.

At this moment, the water in the pool was black and emitted a foul stench. It was clear that the water also contained Mandala Poison.

Then, Ye Qiu saw a pipe in the pool.

This pipe extended from the pool through the Buddha head and reached outside.

Apart from this, there were no other valuable clues.

“It seems that those people were poisoned because of this pipe.”

Ye Qiu was about to leave to investigate where the pipe led when he suddenly stopped.

His gaze fell on Ghost Servant’s body.

“Being poisoned with Mandala Poison and surviving for over twenty years, such endurance is beyond ordinary.”

“Although we are strangers, you left me a treasure map. I won’t take this gift for nothing.”

“I will find the person who poisoned you and avenge you.”

“Rest in peace!”

Ye Qiu bowed three times and left the place.

Because Ghost Servant’s body was highly toxic, Ye Qiu couldn’t take it out for burial.

Back on the surface.

Gu Feng couldn’t wait to ask, “Brother Ye Qiu, how did it go? Did you find anything?”

Yang Qi also curiously asked, “Dr. Ye, what was inside the Buddha head?”

“There was a person living inside,” Ye Qiu said.

“A person?”

Gu Feng and Yang Qi looked at each other in astonishment.

“No way, living inside the Buddha head? What did he eat and drink?” Yang Qi found it unbelievable.

Gu Feng was also skeptical.

“There was indeed a person inside, but when I went in, he was already dead. I found traces of Mandala Poison on his body.”

Ye Qiu didn’t tell the whole truth.

Because he hadn’t figured out Ghost Servant’s identity or the meaning of his words.

“It seems that the deceased was poisoned with Mandala Poison and then spread it to the residents in the apartment building,” Gu Feng frowned and said, “There’s still one thing I can’t figure out.”

“You’re talking about the transmission route, right?” Ye Qiu asked.

“Yes,” Gu Feng nodded, “How did the twelve people in those five households get poisoned?”

“There was a pool inside the Buddha head, and the water in the pool contained Mandala Poison. I also saw a pipe in the pool, and that pipe extended outside. I think that pipe is very likely the transmission route. Let’s investigate further!”

Ye Qiu led Gu Feng and Yang Qi to search the site.

Soon, they found the pipe.

This pipe extended from inside the Buddha head to the vegetable garden, over a hundred meters long.

Because it was buried in the soil, they hadn’t noticed it before.

Ye Qiu tested the site again and found that the vegetable garden indeed contained Mandala Poison.

Not only that, but the vegetables also had traces of Mandala Poison.

When Ye Qiu had previously inspected the apartment building, he had found vegetables in every household.

With this, everything was clear.

The water from the pool inside the Buddha head flowed through the pipe to the vegetable garden, contaminating the vegetables with Mandala Poison. The residents then ate the vegetables, leading to the mass poisoning and deaths.

“I didn’t expect things to turn out this way. Brother Ye Qiu, thank you so much. If it weren’t for your help, I don’t know when I would have figured this out. Thank you,” Gu Feng said gratefully.

“You’re welcome,” Ye Qiu advised, “Make sure to clean up the vegetable garden and the Buddha head thoroughly to prevent the poison from spreading.”

“Got it.”

“It’s getting late; I should head back,” Ye Qiu said.

Gu Feng replied, “I still need to clean up the aftermath, so I won’t see you off. I’ll treat you to a meal later. Xiao Yang, take Brother Ye Qiu back.”

“Yes!”

On the way back to the hospital, Ye Qiu closed his eyes and leaned back in his seat.

At this moment, his mind kept replaying the words Ghost Servant had said.

“When I mentioned my mother’s name, he seemed very agitated. It looks like he knew my mom.”

“And who is this Ye Wushuang?”

“Why did he say not to go to the Capital, or else there would be great trouble?”

“What secrets are hidden in the Capital?”

Beep beep beep—

Suddenly, the shrill ringtone of his phone interrupted Ye Qiu’s thoughts.

He took out his phone and saw that it was Bai Bing calling.

He immediately answered.

Before Ye Qiu could speak, Bai Bing’s serious voice came through, “Where are you? Something has happened!”