The heroine, Lin Ran, receives an invitation from an online friend named Sang to meet in person. She brings her good friend Yu Xin along to a mysterious entrance deep in the forest that Sang sent her. They think they've found a promising connection, but the world beyond the entrance puts their lives through one trial after another. There are multiple intersecting, folded spaces and deadly dangers: poisonous dust falling from the sky, armored patrol vehicles lurking everywhere, games that test their intelligence, and hunter robots. Their strange teammates are hiding secrets, too. Can Lin Ran and Yu Xin escape safely?…
