‘The Mystic Nine Tetralogy’ is a set of four side-stories based in the same backdrop as The Mystic Nine. The stories are independent, but each focuses on one of the key characters in the original show (Huo San Niang, Chen Pi Ah Si, Lieutenant Zhang, and Er Yue Hong). They can be watched in no particular order and are often set as sequels to The Mystic Nine. They are certainly better understood if watched after the main series in order to be familiar with the characters and family history.

‘Ganges Killing the Trees‘ is the story of Huo San Niang.

Set before she officially becomes the leader of the Huo family, the story finds Huo Jinxi and several other members of the Mystic Nine trapped in a mysterious, sealed temple. The group is accidentally cursed after encountering a strange artifact, specifically a cursed brooch. As they struggle to find an exit, they are forced into a deadly game of survival where they must navigate lethal traps and supernatural forces. Suspicion grows among the group as members are picked off one by one, leading to a tense atmosphere where they must decide whether to trust each other or succumb to betrayal to escape the temple alive.