In her third case, Grimme Prize winner Désirée Nosbusch, aka psychologist Cathrin Blake, continues her work as an investigative assistant for the Irish police. Your special expertise and powers of observation are required to save the life of a kidnapped teenager and to support her mentally ill father. Director Züli Aladag focuses on the psychological dimension of an unusual kidnapping case. The harvest festival "Samhain", the Irish-Celtic equivalent of Halloween, serves as the backdrop for the television thriller, which is cleverly staged by director Züli Aladag. Roland Stuprich's excellent camera work sensitively stages the German-Irish ensemble. The psychologist Cathrin Blake (Désirée Nosbusch) actually wants to retire from her work for the police.
However, after a mysterious murder at the Samhain Ghost Parade, Superintendent Kelly (Declan Conlon) enlists her assistance. It's not just about the bloody crime, but also about the disappearance of Holly Reid (Abby Fitz), the victim's girlfriend. When her terrified father, Dylan (Jonathan Delaney Tynan), a lawyer from a prestigious Galway legal dynasty, finds the teenage girl's severed finger on his doorstep, his worst fears come true. Everything points to a kidnapping - the time pressure to find Holly alive is correspondingly great. While Kelly presses ahead with the investigation at full speed, Cathrin calmly turns her attention to Dylan, who is deeply affected by the death of his wife and who is struggling as a single father.
As Cathrin realizes, he cannot or does not want to believe that his daughter is no longer a child. The psychologist soon realizes that some things about the kidnapping don't fit into the usual schemes at all. Holly's disappearance seems more and more like a staging. In order to find the young woman, the psychologist suggests a risky manoeuvre: the police should accept the logic of a mentally ill kidnapper.