Scott (Robert Ryan), a mounted Coast Guard officer, suffers from recurring nightmares involving a maritime tragedy. He sees himself immersed in an eerie landscape surrounded by a shipwreck and walking over skeletons at the bottom of the sea while a ghostly blonde woman beckons him from afar. He thinks he is going mad. However, at the same time, he decides to propose to Eve (Nan Leslie), a young woman working at Geddes, a local shipyard catering to the Coast Guard. She accepts. Eve has a strong resemblance to the ghostly blonde of his nightmares.