After being ordered to transfer to Planet Odon, armored trooper pilot Chirico Cuvie and the other new recruits are subjected to a supposed training exercise, a “simulated battle” designed to test their combat skills. However, the exercise turns out to be a deadly duel meant to eliminate anyone who lacks the necessary abilities. Despite fighting while injured, Chirico survives along with only three others. It soon becomes clear that this is not his first time surviving against overwhelming odds, a fact that Colonel Peruzen seeks to exploit. But can Chirico truly be considered immortal?