Wartime Germany: Marie, a concentration camp escapee on the run from the Nazis, narrowly escapes drowing when she is rescued by Wolfe Kristan a half-mad lighthouse keeper. Brought aboard the lighthouse itself, she begins to fall in love with the assistant keeper who, unknown to her, is a British spy. As the couple become more intimate, Kristan's jealously finally pushes him over the brink and into full-blown madness...

Two teachers, man-hungry Doris and restrained Marian, visit the Yorkshire moors a year after friend Evelyn disappeared there. On a stormy night, they take refuge in the isolated cottage of Stephen, one-time pianist shell-shocked in the Spanish Civil War. Doris flees as soon as the flood subsides; but Marian's suspicions about Evelyn's fate, in conflict with her growing love for Stephen, prompt her to stay on among the misty bogs.