New York detective Tommy Conley arrives in Stockholm to continue tracking down a serial killer with a very specific M.O.

Conley spends every hour attempting to prevent any further killings, and narrows his search down to two suspects.

Eklund and Conley search a hospital for a missing suspect, who has predicted that there will be further victims.

With the help of a computer specialist, Conley and Ecklund find a lead to a suspect on the Deep Web, someone using the initials LH.

Conley and Eklund continue with their investigation into the chat room Temptations. Meanwhile, L.H. attempts to recruit Andrej.

Conley and Eklund both struggle with ghosts from the past. Meanwhile, Frida continues her deadly hunt, though her motives remain a secret.