The next day they made a decision to explore the cave. Wei Xueqing led Maths, Physics, Tangent, Flute and Fong to the cave. They let Li Qianmo stay in The Justice.

The cave was far from the town. There were some weapons and a pack of gunpowder at the mouth of the cave. "They may be useful," said Physics. They took some weapons and the pack of gunpowder. Then each of them had a weapon: Wei Xueqing had a pistol, Flute had a knife, Fong had a big gun, Tangent had a drill and Maths had an ax. Physics even had a cannon!

They went into the cave. It was dark in the cave so they used some torches. Suddenly Wei Xueqing disappeared. "Where are you, Wei Xueqing?" "I'm here! I can't move!" said Wei Xueqing. Others went and saw Wei Xueqing roped. Flute used the knife to cut up the rope. "What happened?" said Flute. "I do not know. I only know I was tied all of a sudden." "The cave is not as easy to be explored as we think," said Maths.

They walked up. There was a stone door. They can't push it. "My cannon is able to break it," said Physics. He took the cannon and shot a cannonball. BOOM! The stone door was broken. They went into it.