Brenda and the team are called in to investigate the questionable disappearance of a shady financial investor. The team is a mess with Daniels now in another division, Gabriel doing double duty, and Provenza with behavior more curious than usual. In the meantime, Brenda and Fritz deal with a sick Kitty.

A high-profile shoot-out has left two policemen and a teenage boy dead leads to numerous mysteries spinning around the case. Enter Force Investigation Division bigwig Sharon Raydor, who upends Brenda's investigation with her merciless snooping.

At the request of Detective Mikki Mendoza, the squad becomes involved in investigating a series of brutal murders that indicate a Mexican drug cartel may have moved into the city.