Kowalska is taken off the murder case as her involvement with Cathy Calvert has made her too subjective but Deering asks her to assist when a student is found dead of an overdose. Drugs expert Randolph Miller directs the team towards a house suspected of being a drugs factory. Former chemical factory employee Angelica Costeros is brought in but refuses to incriminate potential co-defendant Jensen Raphael until Kowalska and Spike Tanner unite to get her to talk.