Ken Ando is a RT mech trainee trying to get into an environmental restoration organization, DC (Divine Crusaders). While working on clearing debris from submerged city he gets into an accident and has to be rescued. The next day he finds out that he didn't make in the top 10 students and isn't allowed to join. After a mysterious box explodes in an abandoned area engulfing the surroundings in a micro black hole, the new recruits are sent out to help when a mysterious mech appears...