
Chase and August investigate a string of gang-related robberies in Little Saigon, the Vietnamese area of downtown Los Angeles. One of the gang members turns out to be the son of August's Vietnam buddy, who died saving August's life. August is further shocked to discover that the boy's mother is the same woman he tried to help get out of Vietnam when he was coming back. They had gotten separated just seconds before their helicopter arrived, and August thought for sure she had died in the years that followed. She wants him to pull her son out of the dangers of gang life, but he knows too much for the gang to let him go.
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.