One after another, hell beasts appear from the evil world "Inferna," deep in the underworld, and the Mystic Rangers, the Dream Squadron, who protect people, fight them off. One day, Karui Shindera, also known as Mystic Blue, encounters the frog hell beast Gerogen. Mystic Blue, who is afraid of frogs, struggles and finds himself in a pinch. Then an even more powerful hell beast appears and attacks Mystic Blue. [BAD END]