On the night of the 11th of July, two guards from a unit of elite Serbian soldiers are making their rounds at the Topcider military camp. The next morning, they are found dead. The military court issues an official report claiming that they were the victims of a ritual suicide, and the investigation is promptly closed. Lawyer Sinisa Stojkovic is commissioned by the parents of the dead men to launch a private investigation. He asks his old friend, Milena Lukin, a specialist in international law, for her assistance. But her investigations start to irritate certain individuals, and soon she is in grave danger. A dreadful suspicion begins to build: it seems that the guards saw something they shouldn't have seen. Could it have had something to do with the anniversary of the worst massacre in European history since World War II?