Fredrika Bergman, who works at the Ministry of Justice, becomes involved in the investigation of a hijacked plane whose co-pilot Erik turns out to be the son of her former boss, the legendary police investigator Alex Recht. The operation is led by the strong willed SÄPO (Swedish Security Sevice) officer, Eden Lundell. As Fredrika and Alex find themselves reunited by a terrible coincidence, th..

In an attempt to get the plane back into Swedish airspace, Alex convinces his son to turn around without Karim's knowledge. Fredrika visits the detained professor Said Khelifi, whose release from custody is one of the hijackers' demands. At the same time she gets in touch with the journalist Andreas Ekman, who claims that the hijackers' other demand, "Operation Tennyson", has..

Despite his earlier suspicions, Erik enlists the help of passenger Osman, also an aircraft technician, to get down into the plane's cargo area. Under immense pressure, they investigate what they first believe to be a bomb. At the same time, Fredrika's doubts about Said Khelifi's guilt grows, as the circumstances surrounding his arrest seem increasingly strange. In a flashback from 2014..

Erik and Osman desperately try to get into the cockpit without the passengers noticing their distress. Captain Karim Sassi becomes the prime suspect, and while Alex tries to locate his family, Fredrika's parallel investigation takes increasingly strange turns. She suspects that Eden is hiding something when she secretly meets with Roger Malm, a mysterious official at a secret division of the m..

Eden suspects that the hijackers are counting on the plane to be shot down and pleads with Bruce to get his superiors to reconsider. At the last second, he averts a disaster, but the danger is not over when it turns out that the hijackers have Karim's family. While Alex desperately searches for the family, it becomes clear that Eden*s past is the reason for the hijacking. The Swedish citizen A..

Lydia holds Karim hostage and Alex fails in his attempts to talk her out of it. At the same time, Fredrika discovers that Adam had two siblings - one of them being Said Khelifi, now released from custody. When the plane is almost completely out of fuel, Eden is forced to give up. She admits to complicity in Adam's death and gets Lydia to tell them where Karim's family is. Just as the fuel..