Fredrika Bergman gets assigned to 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.
Alex convinces his son to turn around the airplane without Karim's knowledge; Fredrika meets detained professor Said Khelifi, whose release from custody is one of the hijackers' demands.
Despite his earlier suspicions, Erik asks passenger and aircraft technician Osman to help him; Fredrika's doubts about Said Khelifi's guilt intensify as the events surrounding his arrest seem increasingly strange.
Desperate to access the cockpit, Erik and Osman attempt to avoid alarming passengers. Captain Sassi faces suspicion as Alex searches for his family while Fredrika's investigation takes bizarre turns.
