Jiu Shi and Lan Zhu meet at Obsidian headquarters, but they are hunted by the dead X members. They are transported back to the previous Doors they’ve completed and end up in the Snowy Village, their first Door. In danger, the ghosts from their previous Doors come to help them, rallied by Qian Li. They try to figure out where the Key is, but Yan Ba Lang is one step ahead. (Source: frankly at MyDramaList)