Alex Recht's investigative team faces another case: an elderly pastor and his wife were found shot dead in the center of Stockholm. All the evidence indicates that the priest killed his wife and then committed suicide, but is this true? Ali, an illegal immigrant from Iraq, has been locked in an underground apartment for days. The unknown people who helped him escape are now seeking a return favor from him. Meanwhile, a young Swede in Bangkok begins to suspect that the chain of troubles that happened to her is not an accident: it is someone’s evil will that is systematically cutting her off from the outside world. Alex and his gifted young colleague Fredrika Bergman have to spend a lot of effort to understand where all these threads connect and why the wildflower has turned into a bloody, sinister symbol.