A Chinese student traveling through Tokyo accidentally obtained an Ultraman Tiga mask. Putting on the mask, he transforms into a giant of light and can switch between three forms. Taking off the mask, he is just an ordinary person who is afraid of trouble.
Dangerous masks that allow people to gain monster powers are circulating in the underground of Tokyo, and the wearer will be swallowed by darkness. The goal of the Dark Kingdom is to resurrect the evil god Gatanjie.
What's even more fatal is that the mysterious woman he fell in love with turned out to be the super-ancient dark giant Camilla - Tiga's old enemy and lover 30 million years ago.
The choice between light and darkness, the bond between love and hate. Wear a mask and protect this city.
