MEET MARIN ASAGI, AN ORDINARY TEENAGE ORPHAN WITH AN EXTRAORDINARY PROBLEM: SHE'S THE TARGET OF A MYSTERIOUS OBJECT IN THE SKY CALLED BRIGADOON. JUST WHEN MARIN IS ABOUT TO LOSE ALL HOPE OF SURVIVING THE INCESSANT WAVE OF MECHA-LIKE WEAPONS SENT FROM BRIGADOON TO CAPTURE HER, A PROTECTOR APPEARS.