Martin Ellingham, a London-based surgeon, relocates to the picturesque seaside village of Port Wenn, establishing himself as the area's general practitioner. He grew up in the area having been raised by his now widowed Aunt Joan Norton. His reasons for leaving London and the high-paid life of a consultant are not clear initially but related to a phobia he has recently developed...
A man suddenly attacks a family event at East Coast Park, driving into the crowd recklessly and then exits the vehicle, slashing whoever comes into his sight. After experiencing this traumatic event, the survivors face immense challenges in rebuilding their life.