After successfully defeating the ancient secret organization, Conan and his friends' lives gradually returned to normal. However, this thrilling experience left an indelible mark on their hearts.

Conan returned to school and continued his studies. Although on the surface he was still the same clever and quick-witted elementary school student, his heart had become more mature and resolute. In class, he still actively answered questions and got along well with his classmates, but whenever the night was quiet, he would think back to the days of fighting against evil forces and ponder how to better protect those around him.

Lin Yu devoted more of his energy to cybersecurity research. Leveraging his experience fighting against the Black Organization and other mysterious groups, he developed a series of advanced network protection technologies, becoming a rising star in the industry. However, he did not become arrogant or complacent; instead, he remained humble and vigilant to prevent similar threats from recurring.

Ai Haibara slowly emerged from the shadows of her past. She no longer dwelled on sadness and fear, but began to try to enjoy life. She often spent time with Conan and Lin Yu, sharing their joys and sorrows. Sometimes, she would go to a florist to buy a bouquet of flowers, savoring that moment of peace and beauty; other times, she would sit on a park bench, watching children play, a faint smile on her face.

Ran and Kogoro Mouri's detective agency is thriving. Kogoro is no longer the clueless detective he once was; after experiencing a series of incidents, he has become more composed and perceptive. Meanwhile, Ran continues to advance in her karate endeavors, achieving outstanding results in numerous competitions.

One day, Conan, Lin Yu, and Ai Haibara met at a coffee shop as usual.

"Lately, I've felt like life is so peaceful it's almost unreal," Lin Yu said, stirring his coffee.

Conan smiled and said, "This peace is hard-won, and we should cherish it."

Ai Haibara took a small sip of her coffee: "But we can't let our guard down."

Just then, a strange man walked into the coffee shop and went straight to their table.

"Excuse me, are you Conan, Lin Yu, and Ai Haibara?" the man asked politely.

Conan and the others looked at him warily: "Who are you?"

The man smiled slightly and took out a business card from his pocket: "I am a special investigator from Interpol. I have some things I would like to discuss with you."

Conan and the others exchanged glances, a sense of unease rising within them.

In a quiet conference room, the man showed them some new intelligence.

“Recently, we have discovered some suspicious activity that is similar to the organization you defeated before,” the man said.

Conan frowned: "Could it be that they still have accomplices?"

The man nodded: "It's possible that some remnants of a force are trying to regroup, or that a new, similar organization has emerged. We hope to get your help."

Conan answered without hesitation, "No problem, as long as it's for justice, we have no choice but to do it."

Lin Yu and Ai Haibara also expressed their willingness to assist.

Thus, they embarked once again on a journey filled with unknowns and challenges.

This time, the enemy was more cunning and covert, and their investigation was not progressing smoothly. Clues always seemed to break at crucial moments, and suspects always managed to escape just as they were about to catch them.

"There must be a mastermind behind this," Lin Yu said.

Conan fell into deep thought: "We must re-examine all the clues and find their flaws."

After countless days and nights of hard work, they finally discovered an important clue—an abandoned factory.

When they arrived at the factory, they found it filled with all sorts of complex mechanisms and traps.

"Watch out!" Conan warned.

They proceeded cautiously, avoiding one trap after another.

Deep within the factory, they finally located the enemy's core area.

"So they're plotting something new here," Ai Haibara said.

Another fierce battle ensued.

Conan used his intelligence and courage to crack one puzzle after another; Lin Yu used his technical expertise to disrupt the enemy's communications and equipment; and Ai Haibara calmly dealt with various emergencies.

Ultimately, they successfully thwarted the enemy's plot and apprehended all the suspects.

"We owe you a lot this time," the Interpol members said, expressing their gratitude.

Conan and the others exchanged a smile: "This is what we should do."

With the case resolved, their lives returned to normal. But they knew that as long as evil existed in the world, they were always ready to stand up again and fight for justice.