Siobhan is a sullen young woman who lives with her father in New Jersey. When he dies, she goes to live with her older sister, who works as a photographer down the shore. The sister tries her best to draw Siobhan out of her shell, but the sudden changes in her life keep her locked inside herself, unwilling to let anyone get too close.
But late at night, she hears strange sounds coming from the ocean. Haunting sounds that call to her like giants from the deep.