What is the main conflict in Jamaica Inn by Daphne Du Maurier?

Jamaica Inn is a novel by celebrated author Daphne du Maurier. In this novel, Mary Yellan comes to live at Jamaica Inn with her aunt and uncle after the death of her widowed mother. Mary comes to the inn expecting to be reunited with the kind, carefree aunt she met once as a young child. However, Mary arrives to find Jamaica Inn a cold, foreboding place that has earned a reputation fitting to the abusive man who has come to be its landlord. Mary almost immediately begins plotting an escape for herself and her aunt, but quickly realizes she does not know whom she can trust.