To safeguard Japan against enormous and enigmatic beasts, the Shinkansen Ultra Evolution Institute emerged, dedicated to preserving peace and safety. Their plan involves developing the "Shinkansen Transformable Robot Shinkalions." The institute is presently occupied with designing a fresh batch of robots and armored vehicles labeled "Zailiners," able to convert into trains to fortify the might of "Shinkalion Z." Gifted youngsters get the chance to control the robots and collaborate with the institute to prevent massive creatures from mysterious adversaries. This unanticipated occurrence brings together two young people in a fortuitous encounter.