L.A. police detective Shane Scully, comes under investigation by Internal Affairs (derisively known as "the tin collectors") after he kills his ex-partner who was one of the mayor's bodyguards. Temporarily reassigned, so that he can remain under the department's watchful eye, Scully finds that more than his badge is at stake when he is set up to take the rap in a deadly plot of corruption and conspiracy that reaches to the highest levels of the LAPD.