Zin Palace is a polished gem of the South Sea. The palace was built by Jingje, and innumerable rare treasures and mysterious books were hidden there. Jingje, the Master of the Monmaidens stayed in the palace for a very long time, afterwards she left the palace and disappeared. Ever since Jingje left, the palace has experienced both prosperity and disgrace, until the day the Zin Twins took charge of Zin Palace. It was then that the former glory and majesty was finally restored. However this time of peace and prosperity wasn’t meant to last and it wasn't long before the Yuan-Ti, under Blood Demon’s control, invaded the palace. They set a clever Chess Trap to besiege Zin Palace, and the Zin Twins had no choice but to ask their disciples to escape to Desert City. Nowadays, the Moonmaidens anxiously await the day when they can return to Zin Palace!

Players can be teleported to Zin Palace by the Ride Guardian in the main city when they are level 40+.

There's even a quick map associated with the intro.