While in isolation, he becomes obsessed with a ship's log from a steamer that sank 90 years prior, drowning all aboard. He begins to conjure the passengers as ghosts in his mind to keep himself company:

Modern critics often highlight the film's "weird and unusually gripping" atmosphere, comparing its style to the expressionistic work of Powell and Pressburger . Thunder Rock (1942) - IMDb

: He imagines their lives, realizing each was a refugee fleeing their own social struggles—an early feminist (Barbara Mullen), a doctor (Frederick Valk) cast out for radical medical ideas, and a poor family seeking a better life.