When someone threatens to blow up a chemical plant, Saga and Martin link all the clues to a common denominator. They pinpoint the perpetrator's location, but will they find what they expect? Martin secretly pries into Saga's past.
Saga and Martin investigate the killing of the eco-terrorists and suspect there is a leader still alive who's been pulling the strings all along. Are there new attacks being planned? Are there more terrorist cells?
A key witness wakes up at the hospital but is suffering from amnesia. Meanwhile, four individuals wearing animal masks carry out a new attack and claim responsibility in an online video. Martin visits Jens again but this time exceeds his authority.