An all-star cast including Sean Penn, Ryan Gosling, Josh Brolin and more forms the thin blue line in this period police drama of the same caliber as crime sagas like L.A. Confidential and The Untouchables. Adapted from the Los Angeles Times series "Tales from the Gangster Squad" by fomer LAPD officer Will Beall, this hard-hitting action drama chronicles the efforts of a few tough cops in 1940s Los Angeles (Gosling, Brolin, Mackie, Pena), operating outside a corrupt department and chaotic bureaucracy, who struggle to keep the East Coast Mafia of Mickey Cohen (Penn) and his mob from raising Hell in the City of Angels.