1912: The jagged, lethal rocks around the bay of Trewarthan have claimed more lives throughout the passing centuries, which is why Parker has been sent to draw up scaled and accurate coastal maps of the area. Arriving in the town, Parker senses hostility. Is it simply his work than the local fishermen fear, or is there something more to Trewarthan than meets the eye? Why do the locals avoid any mention of the lighthouse on Fetch Rock?