Takeru Hinata's past is shrouded in mystery. A once typical high school student, he finds himself spiraling down the cruel path called destiny laid before him due to his family's name. As the deeply philosophical plot thickens it's made apparent that his tyrannous, sexually abusive father, is forcing him to don the "MARS" (a special, anti monster, armored suit) to protect the citizenry of Japan alongside the Anti-unidentified Ancients Special Team (AAST) from the mysterious monsters called "Ancients".