At seventeen, Lin Xiaoman found a brass pocket watch in her grandmother’s old desk. In the middle of the night, it suddenly glowed blue, and the desk split open into a black hole in space and time. A hand marked with eerie patterns reached out from within. Her friend Xia Zhi’s sudden arrival temporarily drove back the danger, but a pattern like the pocket watch appeared on Lin Xiaoman’s wrist. What secrets of time and space lay hidden in the note her grandmother had left behind: “Follow the vines”?