Winter, 1900. A little boy washes up on the beach of a small fishing village in Scotland, barely alive. He bears an uncanny resemblance to teacher Dorothy's son, lost to the sea many years before. When the village is snowed in, Dorothy agrees to look after the child until he can be returned home. But, as the past rises to meet the present, long-buried secrets in this tight-knit community start to come to light. And Dorothy finds herself thrown together again with the reclusive fisherman Joseph, after years of keeping their distance.