While skipping school, Johnny witnesses a car accident near a bridge and finds a dying man named David Wilson. Before Wilson dies, he tells Johnny that he has found “the girl that was taken,” giving Johnny new hope that Alyssa may still be alive. Johnny becomes determined to investigate for himself. He also encounters Levi Freemantle, a huge escaped prisoner who surprisingly treats Johnny with kindness and believes that God has brought them together. Meanwhile, Hunt begins investigating Wilson’s death and realizes that the case may be connected to something much larger.

Johnny begins creating his own investigation into people who might have connections to Alyssa's disappearance. His methods are reckless because he has little faith in adults or the police. At the same time, Hunt's professional and personal life continues to deteriorate: his obsession with Alyssa's case has damaged his marriage and relationship with his son. The disappearance of another girl, Tiffany Shore, makes Hunt suspect that Johnny's case may be part of a larger pattern.

Meanwhile, Hunt investigates Wilson's murder and the disappearance of Tiffany Shore. Johnny's friendship with Levi becomes stronger, and Levi provides Johnny with a sense of protection and stability that he has been missing. Johnny also begins to understand that adults may be involved in the crimes he is investigating. His distrust of authority therefore becomes complicated: although Hunt is a police officer, Johnny increasingly recognizes that Hunt genuinely wants to protect him.

The investigation also becomes more dangerous for Johnny and Levi. Johnny is forced to confront the consequences of his decision to investigate people who may be willing to kill to protect their secrets. His relationship with Levi deepens as they share experiences of grief and loss.

The investigation eventually exposes a child-abuse and pornography network operating in the community. Tiffany is found alive, proving that Johnny's suspicions about a larger conspiracy were justified. However, the discovery also forces Johnny and Hunt to distinguish between the crimes surrounding Tiffany and the mystery of Alyssa. The truth about Alyssa turns out to be much closer to Johnny than he ever imagined.

The truth eventually emerges: Alyssa was not kidnapped by the criminal network. She was accidentally struck by a car driven by Jack's older brother, and the accident was covered up because of the consequences for his future. Jack knew what happened and was pressured into maintaining the false story. Johnny is devastated when he learns that his best friend knew the truth about Alyssa.

Johnny also discovers that his father, Spencer, did not simply abandon the family. Spencer had been investigating Alyssa's disappearance and had discovered information about the child-abuse network. He was killed because he knew too much.

Ken Holloway becomes increasingly violent and threatens both Katherine and Johnny. Levi intervenes to protect them and kills Ken, but Levi is fatally wounded and dies. His death is especially significant because Johnny has come to regard Levi as one of the few people who truly protected him. The novel ends with Johnny and Katherine visiting Levi's grave. Katherine has begun recovering from her addiction, and Johnny writes about everything that happened, addressing the account to Jack. The ending shows Johnny moving from obsessive searching toward acceptance, while still carrying the consequences of everything he has experienced.