Detectives Kevin Bernard (Anthony Anderson) and Cyrus Lupo (Jeremy Sisto) investigate the case of Oswaldo Morales (guest star Hector Javier Munoz), an illegal immigrant found unconscious but still alive on a service road. When the detectives find a possible link to Oswaldo's attack and nine recent bias-related incidents, they uncover a deep-seeded, dangerous bias against Hispanic men within the community.

Firefighter Thomas Cooper and his wife Linda are tortured and murdered in their new townhouse. The murders are thought to be linked to an old unsolved drug case, but then the detectives learn about a firefighter named Nick Spence, who had just joined Cooper's company and was being severely hazed. The investigation suffers a setback when Spence dies in a fire under suspicious circumstances.