Dåådh is invited up to Uppsala by his old professor who needs his help to find out who poisoned one of his students. Dåådh involves himself in the case and quickly realises that his own life is in danger. Someone clearly doesn't like him snooping around. Meanwhile subversive events take place at the home of chief constable back in Stockholm that will affect Dåådh's future. And furthermore his old enemy Märta Raxelius has decided to put her planned revenge into action but rather than striking at Dåådh the blow lands on someone else altogether.