12 years ago, a strange enemy from another dimension arrived and destroyed Tokyo who was almost completely immune to traditional weapons. To combat this alien menace, the government built the giant robot Dai-Guard. Now, years of peace have made Dai-Guard a useless anomaly, and the government foists the robot off on the 21st Security Corporation, a civilian corporation. In these episodes, the Dai-Guard crew find out just how irritating it can be having to answer to a board of directors. Caught between the desire to save the Earth from hostile aliens and the need to fight off their bosses, Dai-Guard finds itself fighting two battles instead of one.