A Columbine-style massacre at a high school in the San Fernando Valley has left a community shaken to its core. Two students are identified as the killers. Both are dead, believed to have committed a mutual suicide. But in the aftermath of the shooting, as LA Special Trials prosecutor Rachel Knight and Detective Bailey Keller dig deeper, they realize that the pieces don't add up. Could it be that the two "killers" were themselves victims? And if so, does that mean that the real killers are still on the loose? When someone starts dropping clues that another horrific crime is in the works, Rachel and Bailey scramble desperately to profile their suspect and prevent another killing--before it's too late.