Escape from the Dark Night

"Many citizens have died tragically in our city recently. The time of death is mostly between 9 pm and 6 am. The TV station hereby warns residents not to go out at night in the near future..." On the streets of the city, Wu Yan was hugged by a madman with a tired face and extremely dark circles under his eyes. He kept muttering "Don't sleep, don't sleep..." As night fell, Wu Yan opened his eyes and looked at the unfamiliar world in front of him. "Welcome, dreamers."