JC and Nina are called into the office of the chief of detectives after 6 months of being off to deal with the deaths of McNamara and Torres. They are assigned to the Special Investigations Division. Along with new detectives Alec Stone, Nell Delaney, and Lt. Malcolm Barker they go after armored car robbers. During the investigation JC and Nina find out they have been recruited to go after Nadine Jordan, the women who killed McNamara and Torres.