Zhang Heng had been about to use LEGO bricks to assemble a motorcycle and have the old man lead the way as they searched this entire abandoned subway line. To his surprise, he soon saw Fan Mei Nan again at the tunnel entrance—the woman Ma Lu had said was missing.
Fan Mei Nan was not injured. Other than looking somewhat pale, she was not much different from before they had separated.
Ma Lu was overjoyed to see her. "Where did you go? It's great that you're all right."
"Oh, I heard something moving in the tunnel earlier, so I went in to take a look. I wasn't paying attention and wandered too far," Fan Mei Nan said vaguely. Then she turned her gaze to Zhang Heng beside her and asked with concern.
"You're back? Did you run into any trouble down there?"
"Yeah, I ran into a little trouble on the way, but it's been dealt with now." Zhang Heng also glossed over his fight with the black giant python. Then he pointed to the old man behind him. "He's Jörmungandr's guide. He can take us out of this subway line, and he can also help us find your sister on that looping subway line."
"My sister isn't there anymore." Fan Mei Nan shook her head.
"Hm?" Zhang Heng raised an eyebrow.
"The sound I heard earlier probably came from my sister." Fan Mei Nan told a lie. "It came from the tunnel at the other end. I found my sister's phone charm there, so I kept following it, but unfortunately, I couldn't find her."
"Is that so?" Zhang Heng was somewhat surprised. He asked the old man, "Where does the tunnel with the snakes lead?"
"You mean the tunnel on the first floor? It's about three kilometers long and