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THE MARGINAL SERVICE
有一天，地球遭到了灰色外星人的袭击。 航空自卫队在外星人的攻击下束手无策，濒临覆没。拯救了航空自卫队的，是不可能存在的有着人类面孔的“传说中的生物”。 因这次事件首次意识到这种生物与人类在地球共存的国家，将他们称为“境界人”，并置于监视之下。 几年后……移民与不可思议的恐怖事件发生，某个机关在这个混乱的世界中成立了。 那就是“境界敢死队（MARGINAL SERVICE）” 这是一个专门打击“境界人”犯罪，并彻底掩盖他们的存在的机关。
After Brian Nightraider gets fired from the police, he gets a letter from the United Nation Immigration Bureau Special Task Force, "Marginal Service." He visits the address in the letter, only to find a bizarre occult shop.
Still on the fence about Borderlanders, Brian goes on a mission to find out the truth. In a red costume, he accompanies Zeno, Robin, and Bolts to Jukai, where the drug factory is supposed to be. On their way, their chopper gets shot down by a missile.
Brian and the team attempt to infiltrate Rubber Suit's mansion while he's holding a charity auction, hoping to retrieve a rare item being used to manufacture illegal drugs.
The team tries to crack a mysterious case involving terrorist bombings that seem to be following a clear pattern, but not a clear purpose.
On Christmas morning, Brian wakes up to a cyberattack to the Marginal Service, which escalates from embarrassing photos to possible data leakage about the Marginal Service and Borderlanders. Lyra has a good idea of who’s responsible.
The Marginal Service finds out that Rubber escaped to Higashino Island. They have to get there on a boat, but Cyrus isn't happy about it since he hates nature. Brian happily suggests a fishing contest. But what he manages to catch is a shark.
Brian and Zeno set out to rescue Robin and Bolts, who have fallen into Rubber Suit's clutches. Little do they know that Robin and Bolts are about to discover a secret about their past that will completely upend the mission.
The Marginal Service goes to the holding facility converted from a mall, where Rubber is being transferred. After Cyrus conducts a medical check up on Rubber, something strange starts to happen.
Rubber is in custody with the higher ups at the UN. Zeno is upset that he can't interrogate Rubber, and suspects that Theodore's hiding something. Zeno collapses and wakes up in Cyrus's lab, and everything starts to look shady.
Zeno gets caught up in the investigation of a missing child, but Brian worries that Zeno may end up going too far due to his troubled past.
Brian is desperate to find Zeno before the rest of the Marginal Service does, and his only choice is to seek information from... Rubber Suit?
Having heard the truth from Rubber, Brian is reunited with Zeno in Mt. Minakami and suggests to rescue children together, but Zeno doesn't listen. While they fight, the doomsday for the Earth, another Gray Shock is about to happen.
