It's in the Puppet Palace (the castle of the Puppeteer)
Lian's party members have been kidnapped by the Puppets and taken to the castle
You have to save them one by one
There's this big room with six doors, each door leads to a random gauntlet that has a party member at the end waiting to be rescued
One of those gauntlets is a three-part quiz show run by an evil version of Jex
And the final round is the battle against Serverberus