Conan and the others quickly dodged, but some people were still grazed by the energy and felt a sharp pain.

“This energy is very powerful; we can’t fight it head-on,” Ai Haibara said.

Conan pondered for a moment and suddenly came up with an idea. He had Lin Yu use high-tech equipment to collect energy data from the surrounding area, trying to find the weakness of the dark energy.

After Lin Yu's quick analysis, they discovered that after the mysterious person's dark energy was released in a concentrated manner, there would be a brief interval of energy fluctuation.

"We'll attack him during the gap in his energy fluctuations after he releases his energy again!" Conan said.

As expected, the mysterious man released dark energy again. Conan and the others were prepared in advance and rushed towards the mysterious man the moment the energy surged.

Ran Mouri unleashed a powerful spinning kick aimed at the mysterious man's head; Nightshade launched a surprise attack from the side, attempting to strike a vital spot; Lin Yu fired a powerful bolt of electricity, directly hitting the mysterious man. Conan, seizing the opportunity, used his tool to attack the mysterious man's wrist, trying to interrupt his energy-casting action.

The mysterious man hadn't anticipated Conan and the others seizing this opportunity to attack, and was caught off guard, struck by their attacks. He collapsed to the ground in agony, and the dark energy dissipated.

Conan and the others seized the opportunity to step forward and pick up the stolen items from the stone platform. Just then, the hideout began to shake violently, seemingly on the verge of collapse.

"Oh no, the mysterious man's failure may have triggered the base's self-destruct mechanism. We have to leave immediately!" Conan said.

Clutching their stolen goods, they quickly fled the hideout. As they escaped, rocks continued to fall from above, gradually blocking the passage.

Ran Mouri was accidentally hit in the leg by a falling rock and fell to the ground.

"Ran-neechan!" Conan immediately ran back to help Ran Mouri up.

Nightshade and Lin Yu helped fend off the falling rocks from behind, buying time for Conan and Ran.

With everyone's combined efforts, they finally managed to escape the stronghold.

"Phew, finally out," Lin Yu said, panting heavily.

Conan looked at the stolen items in his hands, his heart filled with mixed emotions: "Now we must return these items to the ancient family as soon as possible and reseal that evil power."

They took the stolen items to the ancient family. With the help of the family members, they successfully placed the items back in the seal, completing the sealing ritual.

With the seal complete, the strange phenomena in the city gradually disappeared, and everything seemed to return to normal. Conan and his friends once again became heroes of the city, receiving the respect and gratitude of the people.

However, Conan knows this is just one of many crises, and many more challenges await them in the future. He and his companions will continue to protect the peace and tranquility of the city, ready to embrace new adventures at any time.

Even after this incident, Conan and his friends remained vigilant. They knew that the forces of darkness would not give up easily and could return at any time.

One day, Conan received a strange request at the detective agency. The client was an elderly man named Natsume Ichiro, who claimed that his family had been experiencing a series of bizarre events. Family members were having recurring nightmares, in which a mysterious black shadow would appear, and strange noises were frequently emanating from the family's old house. Natsume Ichiro feared that his family would suffer even greater misfortune and hoped that Conan could help solve the mystery.

Conan and Ran Mouri arrived at Ichiro Natsume's house. The Natsume family's old house was a traditional Japanese building, surrounded by lush trees, making it exceptionally quiet. As soon as Conan entered the old house, he sensed an unusual atmosphere.

“Ever since these strange things started happening, everyone in the family has been living in fear,” Natsume Ichiro said worriedly.

Conan began a thorough investigation of the old house, discovering some blurry marks on the walls, suggesting that someone had deliberately erased something. He also found an old diary under the floorboards of one of the rooms.

The diary's pages were yellowed and the handwriting somewhat blurred, but Conan could still barely make out the contents. The diary recorded a little-known part of the Natsume family's history: long ago, an ancestor of the Natsume family had a conflict with a mysterious organization that seemed to be searching for a power that could control people's hearts.

"It seems this mysterious organization is related to the bizarre events involving the Natsume family," Conan said.

Just then, a shrill scream suddenly rang out. Conan and Ran rushed towards the sound and found that Misaki, Natsume Ichiro's granddaughter, was so frightened that she collapsed in the corridor.

"Misaki, what's wrong?" Ran Mouri asked with concern.

Misaki pointed ahead in horror: "That dark figure, I saw that dark figure again!"

Conan looked in the direction Misaki was pointing and saw a dark shadow flash by and disappear into the darkness.

"Don't be afraid, we'll figure it all out," Conan comforted Misaki.

Conan and Ran decided to keep watch at the old house to see if they could find any trace of the shadowy figure. The old house was unusually quiet at night, with only the rustling of leaves in the breeze. Conan and Ran hid in a secluded corner, vigilantly observing their surroundings.

Suddenly, a dark figure appeared at the end of the corridor. Conan and Ran immediately gave chase. The figure ran extremely fast, weaving through the intricate maze of the old house. Conan and Ran pursued relentlessly until finally, in front of a secluded room, the figure stopped.

Conan and Ran Mouri cautiously entered the room, which was filled with a pungent odor. In the center of the room stood a strange device, which flickered with an eerie light.

"What is this?" Ran Mouri asked, puzzled.

Before Conan could answer, the door to the room suddenly closed, and the shadowy figure vanished without a trace.

Conan carefully examined the device and discovered it seemed to be related to some kind of mind control. Just then, the device suddenly emitted a bright light, enveloping Conan and Ran Mouri… What will they encounter? What conspiracy lies behind this mysterious device? Can Conan unravel the mystery and help the Natsume family escape their predicament? Everything is shrouded in suspense.