A tanker is heading towards the bridge. When it is boarded by the coastguard the crew are discovered to be missing. The only people on board are five youths, drugged and chained. Saga and Martin are assigned to investigate the case.
Four individuals wearing animal masks post a video online claiming responsibility for the tanker Saga and Martin are investigating. Deaths are reported of people eating poisoned food. Are the cases connected?
As the investigation moves forward a new group of four, animal head wearing, eco-terrorists post a video online. Saga is having some relationship "issues".
A chemical plant is attacked which threatens to contaminate a water source. Saga realises living with a partner is harder than she thought. Martin looks into Saga's past.
Martin visits Jens in prison and seems to be getting to him. As they re-interview witnesses Saga suspects a statement has been tampered with. Laura regains consciousness and remembers what her assailant looks like.