Jim Street (Colin Farrell is acted the role of) is a member of Los Angeles S.W.A.T (anti-terrorism special police unit), and partner Brian Gamble (Jeremy Renner is acted the role of) when carrying out a hostage rescue mission, because of Brian's mistake, the hostage asks the government to compensate, Brian leaves the police force angrily, Jim is also transferred to other departments, the friendship between the two ends. Six months later, Jim finally returned to S.W.A.T on his own. At this time, S.W.A.T was commanded by Sgt. Dan 'Hondo' Harrelson (Samuel L. Jackson), with five members, and broke the rule that there were no women, and S.W.A.T appeared. The first female member of the team-- a single mother Chris Sanchez (Michelle Rodriguez). Under the guidance of Harrelson, after weeks of rigorous training for the five team members, Jim and his teammates embarked on their first mission: watch the sound.