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.

Saga and Martin continue their hunt for the eco-terrorists, who have realised the police are on their trail.

The hunt is on for the leader of the eco-terrorists, with Saga and Martin hoping to stop any further attacks from happening.

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 sunken boat containing skeletal remains is found, that appears to be related to the eco-terrorist case. Martin's son is taken into hospital in a serious condition.