Frederika Bergmanis a civil servant at the Swedish Department Of Justice, awaiting a promotion whilst reviewing the case of Said Kehlifi - a Syrian academic arrested in obscure circumstances by Swedish Intelligence agency SAPO.

When a plane is hijacked, Kehlifi is the prime suspect. Fredrika is brought in by SAPO's Eden Lundell to help the investigation, and reunited with her ex-boss - retired police chief Alex Recht, whose son is on the plane. Eden and Fredrika immediately clash, and Fredrika becomes increasingly convinced that Eden may be more interested in hiding the truth than finding it.

With the plane heading for disaster, Fredrika partners with investigative journalist Andreas Ekman, finding that Kehlifi and Eden may be connected by the mysterious Operation Tennyson. But is Fredrika's hatred of Eden blinding her, and will she get to the truth before the plane meets its fate?