It is the year 1999. The Machine Empire of Baranoia, led by Emperor Bacchus Wrath, has invaded Earth with the intention of wiping out all human life and bringing about machine rule. Chief Counselor Miura of the UAOH (United Airforce Overtech Hardware), in a desperate attempt to quell this invasion, has revived super energies born of the lost civilization of Pangaea. Enlisting an elite squad of the finest officers the UAOH has to offer, Miura has harnessed Tetrahedron Power, granting the team the power to transform into the Ohrangers… and save humanity from its darkest crisis yet!

When a battle between Bacchusund and Bulldont to defeat the Ohranger creates a new Yokai, the team calls in some experts to help deal with the supernatural threat!

The small suburban Hazuki Inn was run by a reliable and hardworking proprietress, Kana. Her husband, Satoshi, was a playboy and a lazy husband who spent all his money on gambling and women. The Hazuki Inn was also a merchant's inn where salesmen stayed, but a large part of its business was as a place to bring couples.