Vilhelm Thygesen has an innocent errand on one of the islands in the Oslo archipelago. It’s a sunny Maundy Thursday and Thygesen’s 52nd birthday. He is out to clean a beach where a gang of misfits of various kinds have found each other in the nudist swimming club “Hollby United”. But something goes terribly wrong on the idyllic island. A young troubled man with a terrorist mask contacts Thygesen, and reluctantly Thygesen starts investigating a mass killing that has yet to happen. The terrorism he uncovers has little to do with international terror. It is rather terror on the micro plane, described in a novel which is marked by both everyday realism and experimental modernism.