Marvin continued to walk forward with an uneasy mood. Finally, he finally reached the end of the secret passage. However, when he saw the end of the secret passage, his heart sank.

At the end of the secret passage, there is a wall that blocks the secret passage tightly. This wall is not made of bricks, but a whole big stone. There is not even a gap.

After studying for a long time, Ma Wen couldn't find any mechanism to open the door.

At this time, he suddenly heard a "boom boom" sound, which was very similar to the galloping sound of thousands of horses under the echo of the channel. The sound stopped after only a few seconds, and then there was silence.

Marvin had to walk back until he was exhausted and hit another wall again.

Ma Wen was stunned. Walking forward was a wall, and walking backward was a wall. Where was the entrance to the secret passage just now?

When entering this secret passage, Marvin never thought about making a mark. This secret passage is so long, where can I find the entrance?

At this time, Ma Wen finally understood what the sound of the galloping horses was. It was the sound of the entrance to the secret passage being closed.

"Grandpa Cane, wake up quickly. I'm lost." Ma Wen shook the cane in his hand.

Under the guidance of Grandpa Cane, Ma Wen finally returned to the entrance of the secret passage.

Fortunately, I brought Grandpa's navigation with me, otherwise I would have been trapped in this secret passage. Ma Wen couldn't help but feel a little scared.

This entrance and other places in the secret passage seemed to be no different. Marvin searched for a long time before finding a mechanism above his head.

He jumped seven or eight times before poking the mechanism with his cane. When the mechanism was gently touched, a brick popped out of the wall. Ma Wen picked up the brick and saw a map engraved on it. Ma Wen had no time to look at the map, so he first checked the hole that the brick fell out. There was another mechanism. Ma Wen pulled the mechanism, and a stone door opened, revealing the entrance. Ma Wen quickly jumped out of the entrance.

Miahe Jieba was frightened when she saw the entrance to the secret passage being closed. It was not until the entrance to the secret passage was opened again and Marvin came out of the secret passage that he calmed down.

"There is a map here, and there must be a way to get out." Ma Wen put the bricks on the ground and studied them carefully.

While eating what Mia brought him, Marvin tilted his head to look at the map. But after watching for a long time, he still couldn't understand.

Marvin said to Mia helplessly: "This map is more complicated than the treasure map we used to play. Do you understand?"

Mia shook her head.

He stood up with his hind legs, crossed his front legs, and said proudly to Marvin: "I can understand this map."

"What?" Ma Wen remembered his experience on Fireflies. At that time, he also got a roadmap that he couldn't understand, but in the end he bit and understood it.

Jiejie took Ma Wen back to the secret passage, walked a few hundred meters to the right, and found another mechanism. After pressing this mechanism, he heard a roar in the direction of the hall.

When they returned to the hall, an entrance appeared on the wall, inside which was an upward staircase.

Marvin, Mia, bite up the steps together. After turning a few turns, he finally saw the light on the steps. It was not the light, but the sun.

Finally returned to the ground from the bottom of the water.
Chapter completed!