As the autumn sun rises over Stockholm, Eva Nyman and her team are confronted with a strange sight: atop Skinnarviksberg hill sits a chalk-white statue, gazing down at them with a reproachful expression—a replica of the lost statue of Zeus from Olympia. Inside, they find the body of a man who has suffocated in agony, the ominous message in his mouth: 'You know what you've done.' Soon, a second, then a third murder occurs, and again the perpetrator stages them as if they were ancient wonders of the world. The trail leads to the drug scene, where the illegal trade in fentanyl has been claiming innocent victims for decades. Can Eva Nyman stop the killer before he completes his gruesome spree? After all, there are seven wonders of the world...