Sibeal has always known that she is destined for a spiritual life, and is committed to it with all her heart. Before making her final vows, she travels to the northern island of Inis Eala to spend the summer with her sisters, Muirrin and Clodagh. But Sibeal has barely set foot on the island when a freak storm out at sea sinks a ship before her eyes. In spite of frantic rescue efforts, only three survivors are fished alive from the water, and one of them, a man Sibeal names Ardal, clings to life by the merest thread. As Ardal fights for his life, the island community discovers that there is something unusual about the three shipwrecked strangers. The beautiful Svala is mute and disturbed. Stalwart warrior Knut seems ashamed of his grieving wife. And Ardal has a secret he can’t remember … or won’t tell. When the astonishing truth comes out, Sibeal finds herself drawn into a perilous quest. At its end, she will face a decision that may break her heart.