Keiko Tanaka, an S-Rank ARMS Pilot in Training, sought to follow in her fathers footsteps as a combat ace. Now, all she seeks is a way out from under his reputation as a traitor and war criminal. Troubled by the consequences of his actions and his death, she steadfastly presses on in Zyon Corporation despite the anger of her peers. It is on Mars that her loyalties are to be tested. There she must prove to three Ace Pilots that she is not her father. Hopefully, she can rise to the challenge.