Under the Siege tells of the joint operation of the Drug Trafficking and Special Units Division aimed at removing the members of the cartel. The operation ends with a firefight. Agent speznaz Travis Hall takes hostage with a mysterious man with a tattoo depicting a scorpion. The Spezines squad has one armed attack one after another in order to release the captive, known as Scorpio, for its characteristic tattoo on the back. Later, Travis understands that their hostage is a double government agent embedded in the cartel.