A criminal makes a surprising deathbed confession that compels Detective Fontana to re-open his own 10-year-old cold case file concerning the murder of a 12-year-old girl. Instead of the victim's father, whom Fontana is certain committed the crime, the new prime suspect is a former drug-addict whose jailhouse confession to the prosecution's most viable witness is disqualified on the grounds it was made in a spiritual context. Despite dwindling options, Executive Assistant D.A. McCoy continues to pursue a murder-two conviction despite a stern warning from his wary boss, District Attorney Branch, who cautions against the fallout of losing this high-profile case again.

When the body of undercover reporter Teresa Richter is discovered, police soon realize her death is connected to the story she was working on about a Latin gang, L-12. Their investigation leads them to Kevin Drucker, a businessman who reported his car stolen but who was really paying off members of L-12 not to hurt his son Patterson, who was imprisoned on the same cell block with many of the gang members. McCoy and Borgia realize that the only way they can get to L-12, who ordered the hit on Richter, is to get Drucker to testify. Drucker is reluctant to do so, however, unless his son's safety can be guaranteed.