A teenage girl on her way home from school is stabbed through the heart. DI Callum Waverley, heading his first murder case, believes that the feared gang Skull Crew is responsible. But he finds no one in the community who has the courage to help his investigation.
Meanwhile, 16-year-old Luke is sliding into Skull Crew’s grip. So is his schoolfriend, Jessamine. She’s manipulated into carrying knives and guns for the gang’s zombie knife-carrying hitman, believing she’s having a relationship with him.
As the boundaries between guilt and innocence start to blur, Callum tries to break through the code of silence that shrouds the case and bring down the gang’s sinister leader. But can he overcome the secret trauma from his past that threatens to derail him?