The Reckoning sees Detective Constable Maeve Kerrigan hunting the killer who tortured two paedophiles to death. To the public, a killer who targets paedophiles is a hero. And even the police don't regard the murders as a priority. Maeve Kerrigan is shocked by the violence inflicted during these kills – the victims were made to suffer. She believes no-one should be allowed to take the law into their own hands. However, as this serial killer's violence begins to escalate, she is forced to decide how far she's prepared to go to ensure justice is served ...