The circumstances leading to the murder of a teenager and the wounding of a little girl in a drive-by shooting unwind from the points of view of the deputy district attorney, police, paramedics and reporters who report to the scene, and finally, that of one of the perpetrators and his grandfather. David McNorris, the deputy district attorney, manipulates the tragedy to feed his insatiable appetite for power, prestige, and media exposure. Detectives Joel Stevens and Bobby ""Fearless"" Smith and Officers Ray Hechler and Tom Turcotte encounter protective parents, traffic accidents, and a near-drowning as they investigate the shooting and track down the teenaged suspects. Paramedic Teresa Ortiz tends to the wounded young girl and provides the detectives with the information they need to solve the case. Reporter Andrea Little flirts with danger as she strikes up a conversation with her lover's wife to get one scoop on the story, and shows humanity when she refuses to capitalize on a man's gri

Joel and Fearless, and Ray and Tom, discover that things are not what they seem as they set off in a high speed pursuit of a man who is overheard by a telemarketer murdering one person and planning to kill another; as he arranges several meetings with Andrea, David works overtime to allay his wife's suspicion that he's having an affair.

When the charges against Robert Colson, a prominent attorney accused of murdering his former girlfriend, are dismissed at a preliminary hearing, the detectives and patrol officers look for ways to put pressure on Colson's brother and his family to get one of them to flip on him; Andrea takes a personal interest in the story, which keeps David's name on the front page and causes friction with her mother; Joel, who also has taken the case to heart, risks his life as he obtains the evidence that will close the case legitimately after he disagrees with Ray's planting evidence against Colson's sister-in-law to use as leverage.

Haunted by a promise he made to an old friend, Fearless risks his life to protect a little girl who is the only cooperating witness to a mob hit; Ray and Tom investigate a stolen corpse that was shot through a cannon and landed in a hot tub.

In the hours before his execution, a gangbanger gives McNorris a last-minute ultimatum to either save his life or risk the death of a cop kidnapped by his cohorts; Ray's contacts on the street lead the police to the location where the officer is being held, but they arrive too late to save their fellow officer.

Joel and Fearless enlist Ray and Tom in an covert op to track down the thieves who killed Wisnicki and Chandler when the detectives assigned to the case fail to go after John Donadoni, the man behind the murders; when tailing Donadoni leads to Sabrina Fithian, Joel and Fearless break into her apartment to wire it, and stumble into a surveillance led by Katherine Pierce, a Robbery/Homicide detective who's been after Sabrina, and knows that Sabrina and her partner Rachel are the cop killers they're after; after Donadoni threatens Kelly and Willy, Joel lets Donadoni know that Donadoni's mother can also find herself in danger; at Joel's urging, Katherine gets herself reassigned to their squad and gets Ron to assign them to her task force; Sabrina is captured after the team interrupts her latest burglary, but not before Sabrina wounds Katherine and then shoots a two-timing Rachel with Katherine's gun; Joel warns Donadoni that he's a marked man, no matter what happens to the case against S

David comes out of rehab and lands in the middle of the case against Sabrina and Donadoni, although not in the position he'd like at first; Ray and Katherine get bloodied on the witness stand at the preliminary hearing by Sabrina's attorney; David's struggle to stay sober is sorely tested when his father comes for a visit bearing extremely troubling news; when the diamonds stolen by Sabrina and Rachel can't be found, the task force puts their heads together with David to recover the gems, find the key to getting Sabrina to do a full flip on Donadoni, and put Donadoni behind bars.

Called to the police academy to investigate a murder, Joel and Fearless discover that the recruit who discovered the body is none other than Teresa; Ray and Tom work with Katherine to stop a ring of thieves posing as police officers.