For several days now, Matula has been searching for his friend Lessing. When he finally finds him, Lessing is covered in blood and sitting next to the corpse of a judge. Matula can’t believe that his friend killed someone, but also can’t prevent Lessing from going to the police and demanding to be put in custody. When a bomb goes off in Matula’s loft, it becomes clear to them that they’re both the targets of some mysterious killer who has devised a clever trap from which there is no way out.