The series is based around three office workers of the 21st Century Defense Security Corporation's Public Relations Division 2 who, with the company's giant robot, Dai-Guard, fight interdimensional alien beings called "Heterodynes" It aired from October 5, 1999, to March 28, 2000, on TV Tokyo, running for 26 episodes. The series also had a very brief run on Cartoon Network through Toonami's "Giant Robot Week"