Shinigami -Grim Reaper-.Police arrest Rudra as the main suspect responsible for the assassination of a public official who was killed by someone using a sniper rifle-armed Maneuver-Blade mecha- despite him being present with the other AGS personnel during an anti-terrorist operation. After his released from police custody with the intervention of AGS officials, Rudra surmises that the main culprit responsible for the attack on the official was someone from his past. He soon encounters Maya, a very intelligent woman who was his skilled sniper/spotter from his World War III days as an anti-government guerrilla after an attempt is announced on President Oguma.