Ballard uncovers an LAPD conspiracy with connections to a Mexican cartel. The Pearlman case heats up when clues lead to a dangerous showdown with a potential suspect.

When the team uncovers disturbing new information in the Pearlman case, they focus in on a new suspect.

Ballard's serial killer investigation takes a high-stakes turn. With 72 hours to secure the case before it's transferred to Homicide, the team races to find connections between the victims.