An EX-ARM auction is organized by an individual who calls themselves "Auctioneer." Criminal groups from all across the world flock to the Megafloat hoping to get their hands on them.

The Counter Squad is asked by the government to investigate the auction undercover as the bodyguards of Jinkokusha, the leading group in the Japanese underworld. They are immediately dragged into an inter-group conflict, and Akira loses consciousness in combat. When he wakes up, he's greeted by Auctioneer.
You'll all take part 
in the casino auction undercover.
ستشاركون في مزاد الكازينو متخفّين
Wir infiltrieren verkleidet
die Auktion im Casino.
Ustedes se infiltrarán
en la subasta del casino.
Vosotros os infiltraréis
en la subasta del casino.
Vous devrez vous infiltrer
dans le casino sous une fausse identité.
Vi faremo
Quero que se infiltrem no cassino
onde vai acontecer o leilão.
Вы пойдёте на аукцион
в казино под прикрытием.