Upon leaving Boston in disgrace Gael Somerled, a young widow, finds employment as a lighthouse keeper in Port Seaton, Massachusetts. However, the unwanted romantic attentions of her minister, Andrew Zabel, a lonely and troubled man, begin to unravel her sense of independence. What begins as a sadly comical pursuit soon turns obsessive and Gael's attempts to civilly rebuff the powerful minister prove unsuccessful. Meanwhile, she falls in love with Sam Corbyn, a harbor pilot by night and an artist by day. Fueled by jealousy, Andrew begins to stalk and terrorize Gael. Her efforts to use law enforcement to end Andrew's harassment meet with failure when she discovers that no laws exist to protect her. Ultimately, Gael and Andrew become locked in battle of wills with dreadful results.