It's 1920s England, and the coastal town of Gravely is finally enjoying a fragile peace after the Great War. Jon Lowell, a naturalist who writes articles on the flora and fauna of the shoreline, and his wife Harriet lead a simple life, basking in their love for each other and enjoying the company of Jon's visiting old school friend David. But when an American whaler arrives in town with his beautiful red-haired daughters, boasting of his plans to build a pier and pleasure grounds a half-mile out to sea, unexpected tensions and temptations arise. As secrets multiply, Harriet, Jon and David must each ask themselves, what price is to be paid for pleasure?