Alex Rech’s investigative team faces another case: in the heart of Stockholm, an elderly pastor and his wife are found shot dead. All evidence points to the priest having killed his wife and then taken his own life—but is it really so? In an underground apartment, Ali, an illegal immigrant from Iraq, has been locked up for several days already. The unknown people who helped him escape are now demanding a return favor. Meanwhile, a young Swede in Bangkok begins to suspect that the chain of unpleasant events happening to her isn’t a coincidence—it’s someone’s malicious will, steadily cutting her off from the outside world. Alex and his talented young colleague, Fredrika Bergman, must put in considerable effort to figure out where all these threads connect—and why the “field flower” has turned into a bloody, ominous symbol.