I saw the stairs going downstairs. Don't go upstairs. Look at each floor carefully. It's not hard to find. I can't remember whether it's -3 or -4. There's a door underneath anyway. When you enter the room, it will trigger the plot, and you will find the NPC who came in with you. She asked you to watch it for her. As soon as she turns around, she will meet the boss. There was a fight outside the house before, and the boss would run away.
Approach the desert near the sushi market and use hunter skills to find it. In addition, this is a DLC monster, which needs to be guaranteed first. Secondly, the falling rate of more expensive props is very low, so don't expect to get them once. Moreover, each Zhou Mu can only brush monsters once. Pay attention to file in advance before you call. It's best to bring a weak flash to the flying saucer.
Daba village, hydropower station, first talk to the people in the upper right corner of the chariot shop, go out and hit a machine in the upper right corner of the desert, and get a key prop (forgive me for playing too long and forgetting what to call it:-! ) Go back to hand in the task, the man will make way and the woman will join. Enter the deepest control room of the power plant and fight the tentacle monster twice. Be careful, then the power of the power plant is restored, the town returns to normal, and the elevator on the right begins to work.