Nine sons of the dragon

Heaven is the abode of the immortals, and earth is the lot of ordinary people. Dragons guard the peace of mortals. But they themselves have more than enough trouble. The dragon couple has nine sons - restless children endowed with magical powers. Nine little dragons - and not one is like the other. Strong, dexterous, cunning and brave, but disobedient and mischievous. No wonder, they are children! But one day their pranks develop into a real natural disaster.
So, the time has come for dragons to descend from heaven to earth...