When he left the LAPD Bosch took a file with him: the case of a production assistant murdered four years earlier during a film set robbery. The LAPD thinks the stolen money was used to finance a terrorist training camp. Thoughts of the original murder victim were lost in the federal zeal & when Bosch decides to re-investigate he quickly falls fouls of both his old colleagues & the FBI. When the investigation enables him to meet up with an old friend shadows from his past come back to haunt him...