Sumpor.

In 1882, Jelena Ilka Marković orchestrates a failed assassination plot against King Milan Obrenović. Shortly after her conviction, she is found dead in her cell - an official suicide. Seven years later, the discovery of two bodies on the same day - a young girl and the great-grandson of Prince Miloš - reignites the shadows of the past. As a struggling lawyer and the Belgrade Chief of Police reopen the case, they are drawn into a web of political intrigue and secrets powerful enough to shatter the very foundations of Serbia.