Rosamunde Pilcher: Wolken am Horizont (1995)

The young Laura actually has a bright future ahead of her: She marries Alec Haverstock, the man she loves as she has never loved anyone before. But Laura has no idea that Alec's past has a flaw that will soon overshadow her young happiness. On a trip to see Alec's relatives in Cornwall, she embarks on a search for the ominous traces of the past. And she gets into dramatic entanglements that threaten her life.