Kate and Harriet are best friends who are growing up together on an isolated Australian cape in the 1880s. As daughters of the lighthouse keepers, the two girls share everything, until a fisherman, McPhail, arrives in their small community. When Kate witnesses the desire that flares between him and Harriet, she is torn by her feelings of envy and longing. Ultimately, a moment of skylarking in McPhail's hut changes everything...