Barstow investigates an armed robbery that his junkie sister took part in.

Cole and his team go into action when a veteran police officer and his trainee are gunned down in their squad car while on dinner break at a mini-mall.

Cole and his team delve into the world of high-end escort services and Internet sex when the dead body of a call girl is found on a hillside, apparently the victim of a serial rapist turned murderer.

The fearful ex-wife of a newly-paroled gang member begs Cole for protection, because her testimony against the volatile man helped prosecutors put him away.

Cole goes undercover to bring down a group of Vietnamese gunrunners, only to find himself falling in love with the wife of the man behind it all.

Cole wants to avenge the murder of his former partner by seeing to it that the man convicted for the crime doesn't get off death row.