When John Mitchell inherits property from a distant relative, he and his family move from a comfortable living in Whitby to a large country estate in Cornwall. It seems an ideal place for John and his wife to raise their young daughter, Abigail. However, life in the South is not without its problems and he finds himself clashing with the Gaisfords, a powerful old Cornish family. Any problems the family encounter over the years, however, seem to be averted when Abigail marries handsome Luke Gaisford, in spite of her father's warning that still waters run deep.

But Abigail soon learns she should have heeded her father's warning when she uncovers the secrets Luke has been harbouring about his life...