Following the trail of a dismembered corpse, Wei Wuxian and Lan Wangji arrive at the gates of Yi City: an old, abandoned town shrouded in mist and restless spirits. A fiendish foe awaits them in the shadows, heralding a tale of heartbreak and tragedy. When the mysterious corpse`s identity is finally revealed, the hunt for its killer plunges Wei Wuxian back into the depths of the cultivation world`s politics, where he must keep his enemies close and Lan Wangji even closer.