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.