Over the past 16 months, young, blonde, blue-eyed women have been found dead and buried in a field of asphodels. Tracking the killer from New York to Stockholm, NYPD detective Conley is on a special dispensation to observe and advise the Stockholm PD.

Conley is dedicating every waking hour to keeping the killer from finding his victims. With Eklund's team of officers, he is shadowing the two main suspects, a professor and a dentist, both of whom have been in New York and Stockholm during the killings.

The team and the Stockholm PD are searching the hospital and surrounding area for the escapee dentist, whose shocking prophecy that there will be more victims torments Eklund and Conley. While the investigation continues, a new string of murders unfold.

Anonymous With the help of a computer hacker Conley (Dominic Monghan) and Ecklund (Michael Nyqvist) try to merge the existing evidence. In the " Deep Web" the find a trace: someone with the initials "LH" who is apparently recruiting Killers via Web. Thereafter Ecklund reached the news of another horrible crime in Stockholm. A Scandinavian gritty thriller voltage with two international TV Stars as unusual investigators duo.

Following their lead on the copycat killer, the team finds yet another connection to L.H. and the "Temptations" chatroom. Meanwhile L.H.'s mission to recruit Andrej continues. He receives a Russian passport and appears to be on his way to Stockholm.

Conely is tormented by his past, and Eklund deals with a former partner and friend. Meanwhile Frida's deadly hunt to kill truckers continues. The drug she uses to immobilize them ties her to L.H. Her motivation remains a secret to the team.

Martin Lindstrom, a frustrated ex-cop, who was unjustly fired, is out for revenge. He runs amok and shoots and kills random police officers, among them, Andersson, one of Eklund's team. In the meantime, Andrej is setting out to find his first victim.

Phille and the team create an alter ego on the "Temptations" chatroom to lure L.H. to get in contact and divulge information. Awaiting a response, each of the team wrestles with their own demons.

With his fake profile in the chatroom, Phille manages to lure L.H. in. The police find the dead body of a young woman named Sofia and her father points them in the direction of a refugee named Amir, who hosts private sex parties that Sofia had attended.

Investigating Sofia's murder, the team finds a rubber container stained with blood. Göran takes Hanna for a weekend in the countryside. Eklund and Conley interrogate Amir and finds out about Göran blackmailing him.

Conley has an epiphany. It dawns on him that the paintings he saw in Forsberg's apartment resemble the paintings found in Andrej's cabin. Forsberg has to be involved. Conley and Eklund find Forsberg's apartment deserted.

Putting his partner's life over the arrest of Forsberg, Conley dives into the water and fights for Eklund's life. Asha, who has been arrested, is interrogated by Eklund and Conley. She finally caves in to Conley's interrogation and gives up her secret.