Boston, 1833. Aboard the USS Orbis, Hiram Carver takes up his first position as ship's doctor; callow and anxious among the seasoned sailors until he meets William Borden.
Borden. The Hero of the Providence. A legend among sailors, his presence hypnotizes Carver, even before he hears the man's incredible story.
What happens on the Orbis binds Carver and Borden together forever. They will meet again as psychiatrist and patient: Borden driven mad, Carver devoted to his cure.
Though Carver raises up monsters, they will not rest. So he must return once more to the edge of the sea and confront the man - and the myth - that lie in dark water.