This Nightmare Has No End

One day on earth, the northern district of Beiyan City in China was shrouded in a huge spherical smoke. When you put your hand in, you couldn't see your fingers. Suddenly, the purple smoke seemed to let out a scream. Behind all this, there is an unknown secret headquarters that handles such magical things. The world changes, and a mysterious force begins to invade the earth. They fight to solve this force. This power is called dream. This is my first time writing a novel. My writing style may need improvement. Please give me your advice. This is a story about dreams.