There are four seasons in the year and four directions in the sky. Each direction has a divine guardian: the Azure Dragon, the White Tiger, the Vermilion Bird, and the Black Tortoise. Each of the four divine beasts watches over one direction, protecting humanity.
The descendants of the divine beasts often venture into the human realm to train and help humanity destroy the demons.
The Black Tortoise resembles a turtle and feeds on evil dragons. It may look clumsy, but it is actually powerful.
A little Black Tortoise slips into a teleportation array, already eager to visit the human realm...
