LAPD receives an anonymous call: in the sewage pipe on the dam found the body of an unknown person Looks like a typical addict's death from an overdose. But the brilliant flair of the police officer helps detective Harry Bosch to notice what others do not see. He is sure: this man was killed, and before his death he was tortured .. Bosch recognizes the dead - twenty years ago they fought together in Vietnam, such soldiers were called "tunnel rats". Who needed to kill a war veteran, the more tightly he sat on the needle? What secret did he hide? When it turns out that the FBI is interested in murder, and Harry himself is removed from the investigation, he decides to catch the killer using his own methods. This becomes a matter of honor for him.. The novel opens the famous series about Los Angeles police detective Harry Bosch, whose name is a household name - it is chosen in honor of the artist Hieronymus Bosch, a medieval genius whose paintings have not yet been deciphered.