Madoka Kyouno is a vibrant and passionate young woman. She travels around assisting those in need as the proud and sole member of the Kamogawa Girls' High School Jersey Club. Madoka's world is flipped upside down when she is unexpectedly recruited to operate a robot by a mysterious girl named Lan. Madoka volunteers to pilot the revived Vox robot to combat extraterrestrials who have come to assault Earth, motivated by her desire to preserve the people and city of Kamogawa.