Long ago, the Gods created the Four Guardians to rule over the world.

The Cat of Venom, a lion with a mane of spitting cobras instead of hair, to rule the grasslands. For the forests there was the Cat of Storm, a tiger with claws of lightning. For the sea there was the Double Eagle, a great two-headed bird whose four eyes never slept. The ruler of the mountains was the most powerful of the four, the Dragon, a terrible red beast with seven tails and flaming breath. But these protectors were anything but. They exerted their will over their domains, attacking humans for fun. The humans rose up against their tyrannical rulers, and after a long struggle, the monsters were exiled to prisons beyond even their ability to escape. No longer known as the Four Guardians, they became the Raging Four, monsters that haunted fairy tales and nightmares as they sought revenge against the humans who had trapped them.

The kingdom of Katos has known peace ever since then, but as a few are about to discover, the Raging Four are not just myths.