Newly minted FBI agent Mike Warren is all set to take up a prestigious posting in Washington, D.C. when he discovers he's being reassigned to Graceland - a prime piece of beachfront real estate that was seized from drug lords and now serves as an undercover residence for agents from the FBI, DEA and Customs. Mike and his new roommates must all work to solve cases for their respective agencies while also keeping the peace in their own household. Based on real events.

When ongoing investigations clash, Briggs and Mike seize the opportunity to tilt rival gangs against each other while Mike learns that undercover life comes with many moral complications.

Briggs calls on the house to help Lauren with her case against the Russian Mafia and Charlie gets into some hot water when her C.I. proves unreliable during a dangerous drug deal.

Despite Briggs’ hesitations, Mike gets recruited by a Nigerian drug lord to teach gang members how to shoot well, while Paige recruits Jakes and Tuturro to go undercover with a flirtatious and dangerous female pot farmer.

While Mike gets deeper into Bello’s organization, Briggs and Charlie resume their former identities as a sexually-charged couple to get intel on a mysterious drug supplier called Odin.

Mike convinces Bello to steal from the most powerful drug cartel in Southern California and calls on Johnny's unique underwater skills to help. Briggs helps Charlie go to extreme measures to cover-up her bad decisions in the aftermath of a bust that went very wrong.