Maybe he'd change after the wedding

But Jan didn't really think so, and she dreaded her approaching
wedding. She and Jeremy were growing further apart, while her
mother kept pushing her into this fashionable, expedient marriage.

Desperate for a few days' peace, Jan had to get away. Her Aunt
Jessie's house on the Cornish coast seemed just the right spot. But
Aunt Jessie wasn't there!

In charge was a stranger--rough and threatening-looking. Nerves at
the breaking point, Jan felt her life being forced into a new and
frightening direction!