This is a world where Sentinels and Guides coexist. Here, there is a significant difference in strength between the two, and Sentinels are generally responsible for protecting Guides.

The Sentinels possess extraordinary physical qualities and keen senses, allowing them to detect subtle details that ordinary people cannot perceive.

However, this extraordinary perception ability is not without cost, as it makes the Sentinels more susceptible to emotional agitation.

As their abilities continue to improve, the risks faced by Sentinels also increase. The more powerful a Sentinel is, the more likely their mental power will become disrupted.

Once this disorder develops to the extreme, the Sentinel will completely lose control and go into a rampage, causing huge damage to the surrounding area.

At this time, only the guide can use his special abilities to guide and sort out the Sentinel's chaotic spiritual world.

However, the Guide's mental channeling of the Sentinel wasn't without risk. Not only could the Guide be in danger, but there was also a chance of triggering a phenomenon called "binding heat."

This special physiological reaction will closely connect the two people together.

In this world, sentinels and guides are attracted to and interdependent on each other.

The Sentinel also has a special way to replenish the Guide's consumed mental energy, which is through the act of marking.

Once the marking is completed, the guide can obtain a continuous supply of spiritual energy from the sentinel. At the same time, the guide's comfort also gives the sentinel relief.

Although Guides are rare, most families still want to have a strong and high-level Sentinel in their home.

The male protagonist Xie Fang is a guide, but he calls himself a sentinel to others.

Xie Fangze's father Xie Tingwei and his father Wu Yi were in a free love relationship, but the old man of the Xie family did not agree with Xie Tingwei being with an ordinary civilian guide.

So he suppressed them everywhere and made things difficult for them. Faced with the old man's difficulties, Xie Tingwei never compromised.

Finally, Wu Yi became pregnant, and the Xie family's father had no choice but to relent, but on the condition that Wu Yi must give birth to an A-level sentinel for the Xie family. Otherwise, Xie Tingwei would have to break up with Wu Yi and accept a marriage partner arranged by the family.

However, the child Wu Yi gave birth to was a guide. Xie Tingwei did not want to break up with Wu Yi, but at that time he had no ability to resist the old man.

So Xie Tingwei tampered with the child's birth gender and changed Xie Fangze, the guide, into a sentry.

He originally wanted to deceive the old man first, and when his ability became stronger and he could break away from the family's control and protect his wife and children, he could let Xie Fangze restore his normal gender.

But Xie Fangze disagreed. He preferred to be a sentry. Xie Tingwei finally chose to support Xie Fangze's wish and did not change his gender.

When Xie Fangze was ten years old, Wu Yi became pregnant again, but the second child was still a guide. By this time, Xie Fangze had understood a lot of things, and he knew that other family members looked down on his father.

If other people knew that he was also a guide, and his brother was also a guide, then the old man of the Xie family would definitely not let his father and his father go, so Xie Fang was willing to continue living as a sentinel.

By the time Xie Fangze was 27 years old, he had become a highly respected general with his outstanding abilities.

As an A-rank Sentinel, his strength is beyond the reach of other families, and he also has a well-trained and disciplined powerful army under his command.

However, at this moment, a mysterious potion suddenly emerged within the country. It was said that this potion had magical effects, allowing those sentinels whose mental power was out of control to quickly return to normal without relying on the mental power of the guide.

Even without a guide to provide them with spiritual guidance, the Sentinels are no longer prone to losing control of their emotions and going berserk.

At first, this medicine did not attract widespread attention because it was not sold through formal channels and no one knew who the seller behind it was.

However, among the sentinel group, there are still some people who can secretly purchase this drug through various secret channels.

For those sentinels who did not have their own guides, this potion was undoubtedly a life-saving straw for them to escape from their predicament, so they tried every possible way to contact the seller and buy the potion.

But as time went on, people were surprised to find that the sentinels who had used this potion seemed to be addicted to it.

Once the potion is stopped, the sentinel will have hallucinations that are more severe and terrifying than previous rampages. It is as if the person has fallen into an endless abyss and cannot escape. This potion is like a drug.

It wasn't just ordinary sentinels who had used this dangerous potion. Even many battle-hardened soldiers were not spared and were harmed, requiring emergency treatment to save their lives and sanity.

If this medicine continues to circulate and be sold on the market, the entire country will fall into unprecedented panic.

By then, not only will the sentries have problems, but even the rights of the guides will not be protected.

This situation really alarmed the country's top leaders. If this mysterious drug was not controlled promptly and effectively, the entire society would fall into extreme chaos.

Faced with such a serious situation, the leaders decided without hesitation to launch a severe and thorough investigation.

Among the many relevant personnel, the country assigned Xie Fangze a crucial task without hesitation due to his outstanding abilities and keen insight.

This task requires him to go all out to find out where this mysterious potion originated from and who is secretly conducting related research behind the scenes.

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