Don and his team hunt for the killers of two rock climbers found in possession of a large diamond. Also, Charlie decides if he should try to get his FBI clearance reinstated, and a new agent joins the team.

When eight people, including two police officers, are executed in a coffee shop, an LAPD detective gets the team on the case, and they uncover a trail of blackmail, romance and corruption. Also, McGowan's investigation of Charlie and Don deepens.