Description:

Isamu's father, Dr. Shigeno, is a genius scientist. and created new a revolutionary invention. A former research ally, Dr. Kusai, begins to hunt the two, who now will have to do everything they can to prevent the secret formula from falling into the wrong hands. (Source: Novo Verso, translated, edited)

Alternative Titles:

湖の秘密室, Mizuumi no Himitsu-shitsu