When a female juror on Stone's case against a gangbanger winds up dead, the team believes she was murdered because of her guilty vote. They later learn that she committed suicide - driven to it by the cyber harassment of her former boyfriend. Stone goes after him for murder.

After an innocent girl is killed in a gang-related shooting that was instigated on social media, Stone's obsession for justice endangers the family of a cooperating witness. To salvage his crumbling case, Stone must go head-to-head in the courtroom against both the social media providers who inadvertently fueled the gang war and a cocky young man who may have pulled the trigger.