3,000 years ago, the Vader Clan devastated Denzi Star. Denzi Land, an island from Denzi Star, landed on Earth. In modern times, the computer of Denziland awoke the Denzidog IC when it detected the Vader Clan approaching Earth. IC found five young people (who may or may not be descendants of the Denzi people) to become the Denzimen in order to defend Earth, the Vader Clan's next target. The Denzimen begin a long record of success with the defeat of Vader Monster number 00, Flying Squirreler.
