After a series of upheavals, the city finally enjoyed a long period of peace. Conan, Lin Yu, Ai Haibara, Ran Mouri, and Kogoro Mouri also took advantage of this rare tranquility to re-plan their lives.

Conan continued to study diligently at school, and his intelligence enabled him to achieve excellent academic results. At the same time, he did not forget to use his spare time to hone his reasoning skills, preparing for possible new challenges.

Lin Yu devoted himself wholeheartedly to scientific research, and his laboratory continuously produced amazing innovative results, and his name gradually emerged in the scientific community.

Ai Haibara has made great strides in the medical field, and her research has brought new hope for the treatment of many difficult diseases, for which she has been highly praised by her peers.

Ran Mouri went further and further down the path of karate, participating in various domestic and international competitions and achieving outstanding results, becoming a rising star in the karate world.

Kogoro Mouri's detective agency continues to thrive. With his experience and wisdom, he solves one complex case after another, earning him widespread fame.

However, this peace didn't last long. One day, Conan borrowed an old book from the library, and a yellowed note that accidentally fell out of the book caught his attention. The note had some strange symbols and words written on it, and Conan's curiosity was instantly ignited.

He took the note to Lin Yu, who, after studying it, was surprised to find that it might be a hidden treasure map.

"This discovery is amazing. If it's a real treasure, it will cause quite a stir," Lin Yu said.

Conan decides to investigate the mystery with his friends. Following the clues on the note, they arrive at an old manor on the outskirts of the city.

The manor had been abandoned for many years, overgrown with weeds, and the houses were dilapidated. But Conan and his friends discovered a hidden secret room in the manor's basement.

The door to the secret room was tightly closed, and it was inlaid with various complex mechanisms.

"This is no problem for me." Lin Yu confidently stepped forward and began to solve the puzzle.

After some effort, the door finally opened slowly. Inside, a musty, old smell filled the air, and there were some antique boxes and documents.

Conan carefully opened a box filled with precious jewels and gold coins.

"It seems we really have found a treasure," Ran Mouri said with delight.

But just then, a commotion suddenly broke out outside the manor.

"This is bad, someone may have discovered our whereabouts," Ai Haibara said warily.

A group of criminals stormed into the manor, also coveting the treasure.

"Hand over the treasure!" shouted the gang leader.

Conan and his friends did not back down and engaged in a fierce battle with the criminals.

Kogoro Mouri demonstrates his formidable fighting skills, knocking down an enemy with a single punch.

Conan, on the other hand, uses his intelligence to set traps and throw criminals into chaos.

Lin Yu and Ai Haibara were not to be outdone; they worked together with Conan and Ran Mouri to resist the enemy's attack.

During the fierce battle, Conan discovers that the leader of the criminals is carrying a document.

"This could be an important clue." Conan snatched the document amidst the chaos.

The documents record the origin of this treasure; it turns out to be embezzled public funds that had been hidden here for many years.

“We can’t let this money fall into the hands of criminals,” Conan said.

Ultimately, through everyone's joint efforts, the criminals were subdued and the treasure was properly disposed of.

Conan and his friends handed the documents over to the police, who then used the clues to uncover the corrupt gang behind it.

The people in the city applauded Conan and his friends for their bravery and sense of justice.

“We’ve done another good deed,” Ran Mouri said happily.

But Conan knows that their mission is not over yet, and more challenges await them in the future.