An Suda is Ironheart, a superheroine who fights crime using an advanced technological suit of the same name which enables her to fly and fire blasts of energy from her hands. Ironheart is a suit developed jointly by An's father, Dr. Suda, and his colleague, Dr. Kirita. An seeks to follow her father's will in using the suit to fight crime, but those who want to use its power for military purposes target her one after another. When the envious son of Dr. Kirita appears and creates a suit of his own to challenge her, will Ironheart have what it takes to defeat him?