Maggie was right: Kai is alive. The siblings hide together in the abandoned forest hut. Kai's confession that he has killed a lot of people upsets Maggie, as does his explanation, which seems almost unimaginable. After an attempted murder, both are in constant danger. Maggie turns to Voit - without revealing to him that her brother is alive or revealing anything about his involvement in the series of crimes. Meanwhile, Voit's colleague Zajak deciphers a mysterious document that the survivor from the mountain of corpses left behind before his death. On the Polish side, the student Ilona makes a scary discovery. Something is wrong in the isolated boarding school for street children and runaways. Blood donations are mandatory, girls disappear and scary men come and go.