
Chase and August must catch Patricia and Johnny, a mother and son bank robbing team that is responsible for a string of heists and murders. One of the duo's victims at the most recent heist was Gary, Annie's boyfriend. Annie witnessed the murder, and there is an attempt made on her life. Chase and August investigate the armored car company to see if there is a chance that the last heist was an inside job. They question the scheduling man, Morty Feinberg, who appears to be completely in the dark regarding the robbery. We soon learn, however, that he is linked to Patricia and Johnny, and has been helping them set up their heists. Annie works overtime to help Chase and August with the case, while Patricia and Johnny insist on pulling one more job with Feinberg, but it just might be their last.
A young woman is found murdered with fang marks on her neck, her body completely drained of blood. Chase and August attempt to question a suspect dressed as a vampire, but he takes off in a hearse, leading the detectives to a warehouse. They interrupt what appears to be a blood-drinking ceremony with a group of men and women, all dressed as vampires, and bring several ""vampires"" in for questioning. Wanda, the attractive leader of the group, falls for Chase and wants to protect him from the suspect they originally chased, who may not be what he thinks he is, but who may be just a dangerous.
Having just finished lunch in Chinatown, Chase and August are preparing to head back to the station when they see a drug deal going down. A chase ensues, and the detectives split up. When August finds Chase, he is lying in an alley, unconscious, with one of the men lying next to him dead. An eyewitness says she saw Chase kill the unarmed man, but Chase can't remember what happened before he was knocked out. August feels certain his partner is innocent and sets out to uncover the truth while Chase is suspended.