Gayle and Martin fall in love over the course of ten years over a yearly visit to a tiny isolated island off the Welsh coast. Gayle is a teacher and each year she brings her class to the island to see the local flora and fauna from sea birds to playful seals. Martin the island's caretaker and only human resident lives in and maintains the lighthouse which opens to the public for just this one day a year. Gayle is effervescent but feels trapped while Martin is lonely and isolated. As their love slowly builds over time they both yearn for the annual field trip where they can see each other . . . Until one year Gayle doesn't come back and Martin must leave his island hideaway to find her.