On 22 July 2011 five hundred young people attending a summer camp on the island of Utøya were attacked by a heavily armed right-wing extremist, Anders Behring Breivik. The murderous attack claimed the lives of 69 victims. It was a trauma that rocked Norway to the core, and still does to this day. The drama opens with documentary footage of Oslo where, shortly beforehand, the same attacker had exploded a car bomb killing eight people; the scene then shifts to the island. The camera follows 19-year-old Kaja who is spending a few days of holiday here with her young sister Emilie. The two are quarrelling because Emilie is in no mood for the camp and has absolutely no desire to go to the barbecue. And so Kaja ends up going alone. Suddenly, the first gunshot is heard. This first shot marks the beginning of a breathless 72-minute-long reconstruction of events, filmed in a single take, as seen through the eyes of the victims, with Kaja’s desperate search for Emilie and her hope for rescue.