This is the story of Gayle and Martin, who 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 finally see each other. Until one year Gayle doesn’t come back, and Martin has to leave his island hideaway to find her.