Jackson and Olivia Porter’s daughter Ava is thrown overboard during a squall on Puget Sound. In a flash of lightning Livy sees someone on a nearby boat pull something from the water. No one comes forward with their child nor do they recover a body, yet Livy clings to the belief their daughter was rescued. Jackson believes his wife is mentally unstable and falls into dysfunctions of his own. Their marriage is torn apart and Livy flees to the Oregon Coast, where she encounters a legendary ghost-child in the lighthouse manned by her father. She begins to wonder if Jackson is right about her mental instability as she bonds with the ghost, who has a message about Ava. It is as if the squall from nowhere came to reside within each of them, as life unfolds into nightmares of their own making.