After returning to the emperor's eldest grandson's residence, Shen Kouqing dove head first into the study room, and didn't come out even after dinner.

Shen Kouqing was flipping through ancient books, looking for a way to cure the poison.

In the past, she was only interested in learning medicine and thought that it was very mystical. But now, Shen Kouqing realised that treating and saving people was not her interest, but a type of responsibility.

The study door suddenly opened.

Shen Kouqing acted as if she did not hear it, and continued flipping through the medical books in her hands.

"I've been busy all afternoon. Let's take a break!"

The one who entered was Song Yichen, he opened the lid of the box, and the fragrance of the food floated out.

Shen Kouqing moved his nose and said: "I don't want to eat it."

"Then we still need to eat a little." Song Yichen snatched away Shen Kouqing's book and handed the food over to her.

Shen Kouqing could only take it and eat a few mouthfuls, but her heart was full of doubts.

She had searched through almost all the information, yet she could not find what poison it was. Could it be that it came from outside?

He couldn't rule out this possibility, but the problem was that Shen Kouqing had lived with Song Yuanhui for a long time in his previous life, and had never found anyone from another country.

This was precisely what she was puzzled about.

"Don't let your thoughts run wild, hurry up and eat." Song Yichen saw that her mind was preoccupied with many things, so he picked up another chopstick for her.

"How could I not?" Shen Kouqing frowned, "If something happens to the emperor, what about our country?"

The emperor was also in his sixties. It was not that he was reluctant to abdicate, but there was truly no suitable candidate.

The other princes were all courageous and unscrupulous. It was fine if they fought a war, but if one were to say that they were governing a country, it would be impossible for them to do so.

As for Song Yuanhui, he truly had his own strategy and courage, but it was a pity that his heart was not right, if the country were to fall into the hands of such a person, wouldn't it be dangerous!

Shen Kouqing suddenly looked at Song Yichen, and said: "Song Yichen, do you have any thoughts of becoming emperor?"

Song Yichen was startled, he did not expect Shen Kouqing to ask that.

"What are you doing?"

"Just tell me, have you ever had this thought before?"

"Nope." Song Yichen replied without hesitation.

"Really?" Shen Kouqing was a little doubtful. The throne was something that the princes yearned for the most, the crown prince was unconscious to this extent and was also having beautiful dreams of becoming an emperor. How could Song Yichen not be interested?

Furthermore, in his previous life, it was Song Yuanhui who killed Song Yichen. If he didn't have any intentions towards the throne, why would Song Yuanhui be so wary of him?

"Then... If the Emperor insists on passing down the throne to you, are you willing? "

"Stop speaking empty words. Since you have the skill, why don't you think of a way to cure the poison in my body?" Song Yichen stuffed a chicken leg into Shen Kouqing's mouth.

She did not say anything else and just lowered her head to eat. However, a bold idea appeared in her mind.

Song Yichen originally wanted to accompany Shen Kouqing to read the medical books, but Shen Kouqing refused. She insisted that Song Yichen's health was not good and could not stay up late to let him go back to sleep.

As for her, she didn't sleep until the latter half of the night.

The next morning, Shen Kouqing was woken up by a burst of noise.

He got up and called Ting Zhu to ask him. Something big happened.

Last night, Imperial Physician Du and priest went missing, one died, and according to the prison guard's report, priest committed suicide.

Meanwhile, Imperial Physician Du had gone missing when he returned to the estate yesterday. A night had passed, but no one had found him.

Shen Kouqing did not believe that such a coincidence would exist, and immediately got up and washed up before going to the prison.

When she arrived, Song Yichen had already been here for a while. He was looking at priest's body, looking for clues.

"Greetings Royal granddaughter consort."

A few guards at the door bowed towards Shen Kouqing.

"All of you, leave!" Shen Kouqing instructed and walked in.

priest's corpse had long since stiffened, and was in a strange posture. His eyes were filled with fear, and his mouth was wide open, as if he had seen a terrifying thing before he died.

There was a deep cut on his neck. Blood had long since congealed, and a deep wound could be seen on it.

The scene was extremely bloody. Seeing Shen Kouqing coming over, Song Yichen immediately stopped him: "Don't come over, you will have nightmares."

But Shen Kouqing did not even frown.

Since she had died once, she had not been as afraid of these things as she had been before.

Still, she walked over and saw a piece of coarse hemp hanging from the beam. Upon closer inspection, it wasn't a hemp rope.

This kind of grass could be used as a rope. It was extremely difficult to break, but it was very thin. Normally, it was tied together with thick hemp rope, making it harder and harder to wear.

According to the guards, priest committed suicide. Why would there be ox-tendons grass in the prison?

Shen Kouqing crouched down and looked at priest. She could see a thick unwillingness and anger in her eyes.

She could not hold back her laughter as she asked the prison warden sarcastically, "With such an expression on his face, is he really committing suicide?"

"Perhaps …" I regretted it again when I was about to die. "

His words made him stutter, and even he himself would not believe such words, let alone Shen Kouqing.

Shen Kouqing did not say anything and asked him to leave as well. The prison guard leader was unwilling, but he did not dare to resist.

Shen Kouqing reached out to touch his body, but was stopped by Song Yichen.

"What are you doing?" Shen Kouqing asked him in confusion.

Song Yichen frowned. How could a girl be so bold?

He said: "The coroner is here."

"Do you believe in coroner or me?" Shen Kouqing asked with a smile.

Song Yichen almost blurted out his answer, when he suddenly thought about what happened in the Sixth Prince Palace that day, and swallowed back the words that were about to leave his mouth.

This woman was different from the others.

According to the prison wardens, it was in the morning when they brought food to priest, they found out that he had hanged himself and immediately sent someone to inform the Emperor before setting priest down.

Shen Kouqing suddenly remembered something, and turned around to look at the thick hemp rope, there was blood on it.

She cut off the rope, thought for a while, then took the clean end and tied it around priest's neck.

Shen Kouqing released the rope and suddenly frowned.

The blood flow is the same.

She looked at priest's body, but did not find any useful clues.

She frowned as she thought about it. Right at this moment, Song Yichen's eyes suddenly focused, as if he had discovered something.

"Don't move, your body isn't well, be careful of sticking anything dirty on it." Shen Kouqing grabbed his hand.

Song Yichen smiled lightly, pointed at priest's fingernails and asked: "Look at what this is."

Shen Kouqing looked carefully, and her expression immediately changed.

priest's right hand had blood under his fingernails, it was pitch black blood, although it was dried up, Shen Kouqing still had a bit of it.