Genshin Impact.

Lin Feng and Amber were running fast in the forest. Their destination was a mysterious castle, which was said to contain key clues to the conspiracy. The old man and Li'er were behind them, providing them with remote support and intelligence.

"Lin Feng, do you think we can find the truth this time?" Amber's eyes revealed a hint of worry.

Lin Feng looked into the distance and said firmly: "No matter what, we must give it a try. This conspiracy has hurt too many people. We can't let it continue."

Soon, the castle appeared before their eyes. The castle looked eerie, with vines all over the walls and the gates tightly closed, as if resisting the invasion of outsiders.

Lin Feng took a deep breath and pushed the door open. With a creak, the door slowly opened, and a stale and decayed smell came in. They walked into the castle carefully. It was dark and damp inside, and the torches on the wall flickered with a faint light.

Suddenly, a gust of cold wind blew, and Amber couldn't help but shiver. "Lin Feng, I always feel that this place is weird."

Lin Feng clenched the sword in his hand and said, "Be careful, there may be an ambush here."

At this moment, a group of black shadows rushed out from all directions and pounced on them. Lin Feng and Amber quickly stood back to back and started a fierce battle with these black shadows. Lin Feng's sword flashed cold light in the darkness, and each sword accurately pierced the enemy's vital points. Amber cast her spells, and rays of light bloomed in the castle, illuminating the dark corners.

After a fierce battle, they finally defeated the shadows. However, before they could catch their breath, a more terrifying enemy appeared.

A man in a black cloak slowly walked out of the shadows. He was wearing a mask, so his features could not be seen clearly. "Lin Feng, Amber, you are finally here." The man's voice was hoarse and cold.

"Who are you? Why did you plan this conspiracy?" Lin Feng glared at the man.

The man sneered and said, "When you go to hell, you will know." Then he waved his hands and a powerful dark force attacked them.

Lin Feng and Amber fought hard, but the force was too strong and they gradually lost the upper hand. Just when they were about to collapse, the old man and Li'er arrived in time. The old man cast a powerful spell to temporarily suppress the dark force.

"Lin Feng, Amber, we are here to help you." Li'er shouted.

With the help of the old man and Li'er, they gradually turned the tide of the battle. However, just when they were about to defeat the man, he suddenly turned into a cloud of smoke and disappeared.

"Damn it, he got away." Lin Feng said angrily.

"He can't run far, let's look around," said the old man.

They searched everywhere in the castle and finally found a secret passage in a basement. There was a pungent smell in the passage and strange lights flickered on the walls.

Lin Feng and his companions walked into the passage without hesitation and kept going forward. After walking for an unknown period of time, they came to a huge cave. In the cave was a huge magic circle with mysterious runes flashing on it.

"What is this?" Amber asked.

The old man walked forward and observed it carefully. "This is an evil magic circle. It seems that they want to use this magic circle to realize their conspiracy."

At this moment, footsteps were heard in the cave. Lin Feng and the others looked around vigilantly, and saw a group of people in black robes walking in.

"You are finally here. Today is the day you die." said a black-robed man who was leading the group.

A fierce battle broke out again, and Lin Feng and his men fought a desperate battle with the black-robed men. During the battle, Lin Feng discovered that the black-robed men were very powerful and seemed to have undergone special training.

However, Lin Feng and his men did not retreat, their hearts were full of justice and courage. After a hard fight, they finally defeated the black-robed men and destroyed the magic circle.

"It's finally over," Amber said tiredly.

Lin Feng looked at the destroyed magic circle. "Although their conspiracy was thwarted this time, the mastermind behind the scenes has not been found yet. We cannot take it lightly."

The old man nodded. "That's right. We must continue to investigate and find out the mastermind behind this to bring peace to the world."

They walked out of the cave, and the sun shone on them, warm and bright. Although the road ahead was still full of unknowns and dangers, they firmly believed that justice would eventually triumph over evil.