Oslo swelters in the summer heat when a series of shootings shakes the city. An unknown assailant opens fire in crowded areas, and fear spreads quickly. The capital turns into a city under siege. In the middle of the chaos, Emma Ramm’s sister becomes an apparently random victim.

Together with Alexander Blix, a former police investigator, Emma throws herself into the hunt for a killer the police can’t understand. To Blix, it looks like more than random violence. He senses a pattern—a hidden plan with a personal motive for revenge.

As the death toll rises and panic spreads, Blix and Ramm try to stop a man who has lost everything—and has nothing left to lose.