Emerging on Earth in 1980, three thousand years after Denzi’s fall, Queen Hedrian sends Musasabilar to destroy Japan's defenses. However, with her arrival, the technology within the fortress Denzi Land activates with its guardian, Denzi Dog IC, awakening to find those to use the advanced, ancient tech to fight her. He then recruits five adults to form the new the Denshi Sentai Denshimen who manage to defeat the Vader Monster. Upon learning of the return of Denzi Land, Hedrian is horrified and declares war on the Earth.
Despite using multiple methods, from Vader Monsters to her own black magic, Hedrian has a hard time dealing with the Denziman, coming to have headaches and sleepless nights where she worries about them coming to get her.