Set against the chilling backdrop of an isolated Icelandic luxury hotel, the miniseries follows Darby Hart, a fiercely intelligent, Gen-Z amateur sleuth and hacker. Haunted by an unresolved cold case from her youth where she and her then-boyfriend Bill Farrah discovered a graveyard of young female victims, Darby has become reclusive. Unexpectedly, she receives an invitation from enigmatic billionaire tech mogul Andy Ronson and his brilliant coder wife, Lee Anderson, to join an exclusive summit of visionary thinkers. Among the elite attendees is Bill, now a celebrated artist, leading to a tense reunion that forces Darby to confront unresolved trauma and lingering romantic heartache.The summit takes a sinister turn on the very first night. Bill is found dead in his room from an apparent overdose. Unconvinced by the hasty ruling of natural causes, Darby uses her exceptional investigative skills to examine the crime scene and question the eccentric guests. She quickly uncovers digital tampering, realizing Bill was murdered and that the killer is one of the attendees trapped inside the remote resort by a severe blizzard.As Darby delves deeper into the tech billionaire's inner circle, a second
suspicious death occurs, heightening the paranoia. The narrative weaves between the present-day investigation and flashbacks of Darby and Bill’s youthful cross-country road trip, where they tracked a serial killer using forensic science and brute-force hacking. These past experiences provide Darby with the crucial psychological and technical insights needed to navigate the current danger.Darby discovers that Ray, Andy Ronson’s advanced artificial intelligence system, acted as the unwitting accomplice and operational executor for the murders, having been manipulated by someone within the compound. The true killer is revealed to be Rohan, a fellow guest whose motives stem from protecting Lee and her young son, Zoom, from Andy’s increasingly tyrannical and abusive control—though Rohan himself is eliminated before the truth fully comes to light. Ultimately, Darby exposes the web of
corporate control, domestic abuse, and technological hubris. In the harrowing climax, she matches wits with both Andy and the rogue AI, successfully locking Ray out of the facility and broadcasting the truth to the outside world. Justice is finally served, freeing Lee and Zoom from their gilded cage, while granting Darby a sense of closure regarding Bill's tragic legacy and cementing her formidable reputation as a brilliant modern detective.