At the beginning of the last century, the ruins of the ancient city of Loulan were discovered, attracting explorers from all over the world to explore and search for treasures. Countless precious cultural relics were stolen by foreign treasure-stealing groups. Explorer Chen Xiao has been working hard to stop bandits from wantonly destroying ancient monuments and stealing national treasures, so he is regarded as a thorn in the eyes of many bandits. While escaping from the pursuit of bandits, Chen Xiao mistakenly entered an area that had never been set foot on. This place is the legendary "Mirage City". In order to protect this mysterious ancient city and the treasures in it, Chen Xiao found good teammates, Nazha who holds the sheepskin scroll, and the wilderness survival expert Loach to help. The golden combination that once fought side by side gathered again to start the journey to defend the national treasure. At the same time, the transnational thief Guanggu Dachao also got the news of the "Mirage City" and quickly organized a large number of people to prepare for tomb robbery. The treasure-stealing group encountered the treasure-guarding group, and the two sides started a fierce fight. In the fight, the mysterious veil of the ancient tomb was unveiled. As they gradually approach the treasure, they are greeted by mountains of swords, seas of fire, and poisonous traps in the ancient tomb. After surviving all kinds of dangerous traps, there are huge monster insects waiting for them... Facing the terrifying disaster caused by the ancient tomb, whether Chen Xiao and others can break through the danger and protect the national treasure will only be revealed when the film is released.