American Reilly Steele comes to Dublin to head a crime laboratory, and at the same time solve some family problems. But her first case in her new position turns out to be difficult and confusing. At first, when a young man and woman are found dead, all the evidence indicate that a double suicide occurred. However, Reilly feels that something is wrong here, that she and her colleagues missed some important detail. And then new victims are discovered. And again, and again... And then Reilly and her team have no doubt: there is a serial killer in the city. A maniac whose cruelty is not inferior to the perversity of his imagination...