Damien's mother Valerie comes back to the island to help investigate her son's disappearance. Alys and Bronagh meet with a private investigator who worked on the case for years. He leads them to an anonymous new witness - ‘The Weatherman'. His evidence is dramatic. But should we believe him?

Alys and Bronagh go on the hunt for one of the island's most notorious residents - a dealer, who was apparently in a relationship with the key suspect in the case. It turns out the suspect is not the only person to have died of a drug overdose in this dealer's ‘house of death'. When the team eventually find her, she agrees to talk on camera for the first time about Damien's disappearance.