After being assaulted in the city, Doria Hanrahan returns to her hometown, jobless, paranoid, and expecting to cash in on her father's fishing trawler. When she discovers the trawler has been willed to Murray Santoro, who cared for her father during his final illness, she is filled with anger and guilt. Desperate for cash she joins the crew of the Merrichase. On the ocean, far from land, she learns Murray is not only a doctor, but suspected of murder and awaiting trial. She cannot comprehend how her father trusted Murray. She suspects Murray coerced her father to change his will.

Murray finds Doria a true test of his new faith with her stubborn attitude and lack of trust. As challenges mount on their voyage, he struggles with his Christian principles. He can't assume he has a future and his hope falters. Yet, it is Doria's surprising strength and compassion which inspire him to be a better disciple. Then his past returns and threatens to destroy everything.