A young man awakens alone on a remote beach, marooned there by a violent storm. Above the the rocky crags, a lighthouse stands like a sentinel.
Injured and suffering from amnesia, the man seeks the help of Walsh, the enigmatic lighthouse keeper. Walsh tells him they are stranded until the next ferry arrives in two weeks, and insists they are the sole inhabitants of the peninsula. But the man is haunted by fleeting glimpses of a beautiful young woman, and plagued by visions of hideous phantoms reaching out from the depths.